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diff --git a/components/script/dom/bindings/codegen/test/TestCodeGen.webidl b/components/script/dom/bindings/codegen/test/TestCodeGen.webidl
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index 00000000000..8c2b3c1b6b4
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+++ b/components/script/dom/bindings/codegen/test/TestCodeGen.webidl
@@ -0,0 +1,442 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+typedef long myLong;
+typedef TestInterface AnotherNameForTestInterface;
+typedef TestInterface? NullableTestInterface;
+
+interface TestExternalInterface;
+
+interface TestNonCastableInterface {
+};
+
+callback interface TestCallbackInterface {
+  readonly attribute long foo;
+  void doSomething();
+};
+
+enum TestEnum {
+  "a",
+  "b"
+};
+
+callback TestCallback = void();
+
+TestInterface implements ImplementedInterface;
+
+// This interface is only for use in the constructor below
+interface OnlyForUseInConstructor {
+};
+
+[Constructor,
+ Constructor(DOMString str),
+ Constructor(unsigned long num, boolean? bool),
+ Constructor(TestInterface? iface),
+ Constructor(TestNonCastableInterface iface)
+ // , Constructor(long arg1, long arg2, (TestInterface or OnlyForUseInConstructor) arg3)
+ ]
+interface TestInterface {
+  // Integer types
+  // XXXbz add tests for throwing versions of all the integer stuff
+  readonly attribute byte readonlyByte;
+  attribute byte writableByte;
+  void passByte(byte arg);
+  byte receiveByte();
+  void passOptionalByte(optional byte arg);
+  void passOptionalByteWithDefault(optional byte arg = 0);
+  void passNullableByte(byte? arg);
+  void passOptionalNullableByte(optional byte? arg);
+
+  readonly attribute short readonlyShort;
+  attribute short writableShort;
+  void passShort(short arg);
+  short receiveShort();
+  void passOptionalShort(optional short arg);
+  void passOptionalShortWithDefault(optional short arg = 5);
+
+  readonly attribute long readonlyLong;
+  attribute long writableLong;
+  void passLong(long arg);
+  long receiveLong();
+  void passOptionalLong(optional long arg);
+  void passOptionalLongWithDefault(optional long arg = 7);
+
+  readonly attribute long long readonlyLongLong;
+  attribute long long writableLongLong;
+  void passLongLong(long long arg);
+  long long receiveLongLong();
+  void passOptionalLongLong(optional long long arg);
+  void passOptionalLongLongWithDefault(optional long long arg = -12);
+
+  readonly attribute octet readonlyOctet;
+  attribute octet writableOctet;
+  void passOctet(octet arg);
+  octet receiveOctet();
+  void passOptionalOctet(optional octet arg);
+  void passOptionalOctetWithDefault(optional octet arg = 19);
+
+  readonly attribute unsigned short readonlyUnsignedShort;
+  attribute unsigned short writableUnsignedShort;
+  void passUnsignedShort(unsigned short arg);
+  unsigned short receiveUnsignedShort();
+  void passOptionalUnsignedShort(optional unsigned short arg);
+  void passOptionalUnsignedShortWithDefault(optional unsigned short arg = 2);
+
+  readonly attribute unsigned long readonlyUnsignedLong;
+  attribute unsigned long writableUnsignedLong;
+  void passUnsignedLong(unsigned long arg);
+  unsigned long receiveUnsignedLong();
+  void passOptionalUnsignedLong(optional unsigned long arg);
+  void passOptionalUnsignedLongWithDefault(optional unsigned long arg = 6);
+
+  readonly attribute unsigned long long readonlyUnsignedLongLong;
+  attribute unsigned long long  writableUnsignedLongLong;
+  void passUnsignedLongLong(unsigned long long arg);
+  unsigned long long receiveUnsignedLongLong();
+  void passOptionalUnsignedLongLong(optional unsigned long long arg);
+  void passOptionalUnsignedLongLongWithDefault(optional unsigned long long arg = 17);
+
+  // Castable interface types
+  // XXXbz add tests for throwing versions of all the castable interface stuff
+  TestInterface receiveSelf();
+  TestInterface? receiveNullableSelf();
+  TestInterface receiveWeakSelf();
+  TestInterface? receiveWeakNullableSelf();
+  // A verstion to test for casting to TestInterface&
+  void passSelf(TestInterface arg);
+  // A version we can use to test for the exact type passed in
+  void passSelf2(TestInterface arg);
+  void passNullableSelf(TestInterface? arg);
+  attribute TestInterface nonNullSelf;
+  attribute TestInterface? nullableSelf;
+  // Optional arguments
+  void passOptionalSelf(optional TestInterface? arg);
+  void passOptionalNonNullSelf(optional TestInterface arg);
+  void passOptionalSelfWithDefault(optional TestInterface? arg = null);
+
+  // Non-wrapper-cache interface types
+  [Creator]
+  TestNonWrapperCacheInterface receiveNonWrapperCacheInterface();
+  [Creator]
+  TestNonWrapperCacheInterface? receiveNullableNonWrapperCacheInterface();
+  [Creator]
+  sequence<TestNonWrapperCacheInterface> receiveNonWrapperCacheInterfaceSequence();
+  [Creator]
+  sequence<TestNonWrapperCacheInterface?> receiveNullableNonWrapperCacheInterfaceSequence();
+  [Creator]
+  sequence<TestNonWrapperCacheInterface>? receiveNonWrapperCacheInterfaceNullableSequence();
+  [Creator]
+  sequence<TestNonWrapperCacheInterface?>? receiveNullableNonWrapperCacheInterfaceNullableSequence();
+
+  // Non-castable interface types
+  TestNonCastableInterface receiveOther();
+  TestNonCastableInterface? receiveNullableOther();
+  TestNonCastableInterface receiveWeakOther();
+  TestNonCastableInterface? receiveWeakNullableOther();
+  // A verstion to test for casting to TestNonCastableInterface&
+  void passOther(TestNonCastableInterface arg);
+  // A version we can use to test for the exact type passed in
+  void passOther2(TestNonCastableInterface arg);
+  void passNullableOther(TestNonCastableInterface? arg);
+  attribute TestNonCastableInterface nonNullOther;
+  attribute TestNonCastableInterface? nullableOther;
+  // Optional arguments
+  void passOptionalOther(optional TestNonCastableInterface? arg);
+  void passOptionalNonNullOther(optional TestNonCastableInterface arg);
+  void passOptionalOtherWithDefault(optional TestNonCastableInterface? arg = null);
+
+  // External interface types
+  TestExternalInterface receiveExternal();
+  TestExternalInterface? receiveNullableExternal();
+  TestExternalInterface receiveWeakExternal();
+  TestExternalInterface? receiveWeakNullableExternal();
+  // A verstion to test for casting to TestExternalInterface&
+  void passExternal(TestExternalInterface arg);
+  // A version we can use to test for the exact type passed in
+  void passExternal2(TestExternalInterface arg);
+  void passNullableExternal(TestExternalInterface? arg);
+  attribute TestExternalInterface nonNullExternal;
+  attribute TestExternalInterface? nullableExternal;
+  // Optional arguments
+  void passOptionalExternal(optional TestExternalInterface? arg);
+  void passOptionalNonNullExternal(optional TestExternalInterface arg);
+  void passOptionalExternalWithDefault(optional TestExternalInterface? arg = null);
+
+  // Callback interface types
+  TestCallbackInterface receiveCallbackInterface();
+  TestCallbackInterface? receiveNullableCallbackInterface();
+  TestCallbackInterface receiveWeakCallbackInterface();
+  TestCallbackInterface? receiveWeakNullableCallbackInterface();
+  // A verstion to test for casting to TestCallbackInterface&
+  void passCallbackInterface(TestCallbackInterface arg);
+  // A version we can use to test for the exact type passed in
+  void passCallbackInterface2(TestCallbackInterface arg);
+  void passNullableCallbackInterface(TestCallbackInterface? arg);
+  attribute TestCallbackInterface nonNullCallbackInterface;
+  attribute TestCallbackInterface? nullableCallbackInterface;
+  // Optional arguments
+  void passOptionalCallbackInterface(optional TestCallbackInterface? arg);
+  void passOptionalNonNullCallbackInterface(optional TestCallbackInterface arg);
+  void passOptionalCallbackInterfaceWithDefault(optional TestCallbackInterface? arg = null);
+
+  // Miscellaneous interface tests
+  IndirectlyImplementedInterface receiveConsequentialInterface();
+  void passConsequentialInterface(IndirectlyImplementedInterface arg);
+
+  // Sequence types
+  sequence<long> receiveSequence();
+  sequence<long>? receiveNullableSequence();
+  sequence<long?> receiveSequenceOfNullableInts();
+  sequence<long?>? receiveNullableSequenceOfNullableInts();
+  void passSequence(sequence<long> arg);
+  void passNullableSequence(sequence<long>? arg);
+  void passSequenceOfNullableInts(sequence<long?> arg);
+  void passOptionalSequenceOfNullableInts(optional sequence<long?> arg);
+  void passOptionalNullableSequenceOfNullableInts(optional sequence<long?>? arg);
+  sequence<TestInterface> receiveCastableObjectSequence();
+  sequence<TestInterface?> receiveNullableCastableObjectSequence();
+  sequence<TestInterface>? receiveCastableObjectNullableSequence();
+  sequence<TestInterface?>? receiveNullableCastableObjectNullableSequence();
+  sequence<TestInterface> receiveWeakCastableObjectSequence();
+  sequence<TestInterface?> receiveWeakNullableCastableObjectSequence();
+  sequence<TestInterface>? receiveWeakCastableObjectNullableSequence();
+  sequence<TestInterface?>? receiveWeakNullableCastableObjectNullableSequence();
+  void passCastableObjectSequence(sequence<TestInterface> arg);
+  void passNullableCastableObjectSequence(sequence<TestInterface?> arg);
+  void passCastableObjectNullableSequence(sequence<TestInterface>? arg);
+  void passNullableCastableObjectNullableSequence(sequence<TestInterface?>? arg);
+  void passOptionalSequence(optional sequence<long> arg);
+  void passOptionalNullableSequence(optional sequence<long>? arg);
+  void passOptionalNullableSequenceWithDefaultValue(optional sequence<long>? arg = null);
+  void passOptionalObjectSequence(optional sequence<TestInterface> arg);
+
+  sequence<DOMString> receiveStringSequence();
+  void passStringSequence(sequence<DOMString> arg);
+
+  sequence<any> receiveAnySequence();
+  sequence<any>? receiveNullableAnySequence();
+
+  // Typed array types
+  void passArrayBuffer(ArrayBuffer arg);
+  void passNullableArrayBuffer(ArrayBuffer? arg);
+  void passOptionalArrayBuffer(optional ArrayBuffer arg);
+  void passOptionalNullableArrayBuffer(optional ArrayBuffer? arg);
+  void passOptionalNullableArrayBufferWithDefaultValue(optional ArrayBuffer? arg= null);
+  void passArrayBufferView(ArrayBufferView arg);
+  void passInt8Array(Int8Array arg);
+  void passInt16Array(Int16Array arg);
+  void passInt32Array(Int32Array arg);
+  void passUint8Array(Uint8Array arg);
+  void passUint16Array(Uint16Array arg);
+  void passUint32Array(Uint32Array arg);
+  void passUint8ClampedArray(Uint8ClampedArray arg);
+  void passFloat32Array(Float32Array arg);
+  void passFloat64Array(Float64Array arg);
+  Uint8Array receiveUint8Array();
+
+  // String types
+  void passString(DOMString arg);
+  void passNullableString(DOMString? arg);
+  void passOptionalString(optional DOMString arg);
+  void passOptionalStringWithDefaultValue(optional DOMString arg = "abc");
+  void passOptionalNullableString(optional DOMString? arg);
+  void passOptionalNullableStringWithDefaultValue(optional DOMString? arg = null);
+
+  // Enumerated types
+  void passEnum(TestEnum arg);
+  // No support for nullable enums yet
+  // void passNullableEnum(TestEnum? arg);
+  void passOptionalEnum(optional TestEnum arg);
+  void passEnumWithDefault(optional TestEnum arg = "a");
+  // void passOptionalNullableEnum(optional TestEnum? arg);
+  // void passOptionalNullableEnumWithDefaultValue(optional TestEnum? arg = null);
+  TestEnum receiveEnum();
+  attribute TestEnum enumAttribute;
+  readonly attribute TestEnum readonlyEnumAttribute;
+
+  // Callback types
+  void passCallback(TestCallback arg);
+  void passNullableCallback(TestCallback? arg);
+  void passOptionalCallback(optional TestCallback arg);
+  void passOptionalNullableCallback(optional TestCallback? arg);
+  void passOptionalNullableCallbackWithDefaultValue(optional TestCallback? arg = null);
+  TestCallback receiveCallback();
+  TestCallback? receiveNullableCallback();
+
+  // Any types
+  void passAny(any arg);
+  void passOptionalAny(optional any arg);
+  void passAnyDefaultNull(optional any arg = null);
+  any receiveAny();
+
+  // object types
+  void passObject(object arg);
+  void passNullableObject(object? arg);
+  void passOptionalObject(optional object arg);
+  void passOptionalNullableObject(optional object? arg);
+  void passOptionalNullableObjectWithDefaultValue(optional object? arg = null);
+  object receiveObject();
+  object? receiveNullableObject();
+
+  // Union types
+  void passUnion((object or long) arg);
+  void passUnionWithNullable((object? or long) arg);
+  void passNullableUnion((object or long)? arg);
+  void passOptionalUnion(optional (object or long) arg);
+  void passOptionalNullableUnion(optional (object or long)? arg);
+  void passOptionalNullableUnionWithDefaultValue(optional (object or long)? arg = null);
+  //void passUnionWithInterfaces((TestInterface or TestExternalInterface) arg);
+  //void passUnionWithInterfacesAndNullable((TestInterface? or TestExternalInterface) arg);
+  //void passUnionWithSequence((sequence<object> or long) arg);
+  void passUnionWithArrayBuffer((ArrayBuffer or long) arg);
+  void passUnionWithString((DOMString or object) arg);
+  //void passUnionWithEnum((TestEnum or object) arg);
+  void passUnionWithCallback((TestCallback or long) arg);
+  void passUnionWithObject((object or long) arg);
+  //void passUnionWithDict((Dict or long) arg);
+
+  // binaryNames tests
+  void methodRenamedFrom();
+  void methodRenamedFrom(byte argument);
+  readonly attribute byte attributeGetterRenamedFrom;
+  attribute byte attributeRenamedFrom;
+
+  void passDictionary(optional Dict x);
+  void passOtherDictionary(optional GrandparentDict x);
+  void passSequenceOfDictionaries(sequence<Dict> x);
+  void passDictionaryOrLong(optional Dict x);
+  void passDictionaryOrLong(long x);
+
+  void passDictContainingDict(optional DictContainingDict arg);
+  void passDictContainingSequence(optional DictContainingSequence arg);
+
+  // EnforceRange/Clamp tests
+  void dontEnforceRangeOrClamp(byte arg);
+  void doEnforceRange([EnforceRange] byte arg);
+  void doClamp([Clamp] byte arg);
+
+  // Typedefs
+  const myLong myLongConstant = 5;
+  void exerciseTypedefInterfaces1(AnotherNameForTestInterface arg);
+  AnotherNameForTestInterface exerciseTypedefInterfaces2(NullableTestInterface arg);
+  void exerciseTypedefInterfaces3(YetAnotherNameForTestInterface arg);
+
+  // Miscellania
+  [LenientThis] attribute long attrWithLenientThis;
+};
+
+interface TestNonWrapperCacheInterface {
+};
+
+interface ImplementedInterfaceParent {
+  void implementedParentMethod();
+  attribute boolean implementedParentProperty;
+
+  const long implementedParentConstant = 8;
+};
+
+ImplementedInterfaceParent implements IndirectlyImplementedInterface;
+
+[NoInterfaceObject]
+interface IndirectlyImplementedInterface {
+  void indirectlyImplementedMethod();
+  attribute boolean indirectlyImplementedProperty;
+
+  const long indirectlyImplementedConstant = 9;
+};
+
+interface ImplementedInterface : ImplementedInterfaceParent {
+  void implementedMethod();
+  attribute boolean implementedProperty;
+
+  const long implementedConstant = 5;
+};
+
+interface DiamondImplements {
+  readonly attribute long diamondImplementedProperty;
+};
+interface DiamondBranch1A {
+};
+interface DiamondBranch1B {
+};
+interface DiamondBranch2A : DiamondImplements {
+};
+interface DiamondBranch2B : DiamondImplements {
+};
+TestInterface implements DiamondBranch1A;
+TestInterface implements DiamondBranch1B;
+TestInterface implements DiamondBranch2A;
+TestInterface implements DiamondBranch2B;
+DiamondBranch1A implements DiamondImplements;
+DiamondBranch1B implements DiamondImplements;
+
+dictionary Dict : ParentDict {
+  TestEnum someEnum;
+  long x;
+  long a;
+  long b = 8;
+  long z = 9;
+  DOMString str;
+  DOMString empty = "";
+  TestEnum otherEnum = "b";
+  DOMString otherStr = "def";
+  DOMString? yetAnotherStr = null;
+};
+
+dictionary ParentDict : GrandparentDict {
+  long c = 5;
+  TestInterface someInterface;
+  TestExternalInterface someExternalInterface;
+};
+
+dictionary DictContainingDict {
+  Dict memberDict;
+};
+
+dictionary DictContainingSequence {
+  sequence<long> ourSequence;
+};
+
+interface TestIndexedGetterInterface {
+  getter long item(unsigned long index);
+  [Infallible]
+  readonly attribute unsigned long length;
+};
+
+interface TestNamedGetterInterface {
+  getter DOMString (DOMString name);
+};
+
+interface TestIndexedAndNamedGetterInterface {
+  getter long (unsigned long index);
+  getter DOMString namedItem(DOMString name);
+  [Infallible]
+  readonly attribute unsigned long length;
+};
+
+interface TestIndexedSetterInterface {
+  setter creator void setItem(unsigned long index, DOMString item);
+};
+
+interface TestNamedSetterInterface {
+  setter creator void (DOMString name, TestIndexedSetterInterface item);
+};
+
+interface TestIndexedAndNamedSetterInterface {
+  setter creator void (unsigned long index, TestIndexedSetterInterface item);
+  setter creator void setNamedItem(DOMString name, TestIndexedSetterInterface item);
+};
+
+interface TestIndexedAndNamedGetterAndSetterInterface : TestIndexedSetterInterface {
+  getter long item(unsigned long index);
+  getter DOMString namedItem(DOMString name);
+  setter creator void (unsigned long index, long item);
+  setter creator void (DOMString name, DOMString item);
+  [Infallible]
+  stringifier DOMString ();
+  [Infallible]
+  readonly attribute unsigned long length;
+};