Auto merge of #12468 - asajeffrey:constellation-remove-panic-channel, r=emilio

Removed panic channel, replaced by integrated logging and issue reporting

<!-- Please describe your changes on the following line: -->

Remove the previous ad hoc panic channel, replace it by an integrated logging and panicking mechanism, including crash reporting. All thread panics are now reported, not just content threads.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #11838
- [X] These changes do not require tests because we don't test error reporting

<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/12468)
<!-- Reviewable:end -->

1 files changed, 1 insertions, 9 deletions

diff --git a/components/script/dom/bindings/global.rs b/components/script/dom/bindings/global.rs
index 5adcbb67818..fe81b8a14de 100644
--- a/components/script/dom/bindings/global.rs
+++ b/components/script/dom/bindings/global.rs
@@ -18,7 +18,7 @@ use ipc_channel::ipc::IpcSender;
 use js::jsapi::{CurrentGlobalOrNull, GetGlobalForObjectCrossCompartment};
 use js::jsapi::{JSContext, JSObject, JS_GetClass, MutableHandleValue};
 use js::{JSCLASS_IS_DOMJSCLASS, JSCLASS_IS_GLOBAL};
-use msg::constellation_msg::{PipelineId, PanicMsg};
+use msg::constellation_msg::PipelineId;
 use net_traits::filemanager_thread::FileManagerThreadMsg;
 use net_traits::{ResourceThreads, CoreResourceThread, IpcSend};
 use profile_traits::{mem, time};
@@ -283,14 +283,6 @@ impl<'a> GlobalRef<'a> {
         }
     }
 
-    /// Returns an `IpcSender` to report panics on.
-    pub fn panic_chan(&self) -> &IpcSender<PanicMsg> {
-        match *self {
-            GlobalRef::Window(ref window) => window.panic_chan(),
-            GlobalRef::Worker(ref worker) => worker.panic_chan(),
-        }
-    }
-
     /// Returns a wrapper for runnables to ensure they are cancelled if the global
     /// is being destroyed.
     pub fn get_runnable_wrapper(&self) -> RunnableWrapper {