Update string_cache to 0.2.

Updated string_cache, html5ever, xml5ever and selectors in Cargo.toml files and Cargo.lock.
Removed references to string_cache_plugin.
Import atom! and ns! from string_cache.
Replaced ns!("") by ns!().
Replaced ns!(XML) and co by ns!(xml) and co.
Replaced atom!(foo) by atom!("foo").
Replaced Atom::from_slice by Atom::from.
Replaced atom.as_slice() by &*atom.

1 files changed, 2 insertions, 2 deletions

diff --git a/components/script/dom/htmlmetaelement.rs b/components/script/dom/htmlmetaelement.rs
index 5f581e2a433..0d2730c5f42 100644
--- a/components/script/dom/htmlmetaelement.rs
+++ b/components/script/dom/htmlmetaelement.rs
@@ -48,7 +48,7 @@ impl HTMLMetaElement {
 
     fn process_attributes(&self) {
         let element = self.upcast::<Element>();
-        if let Some(name) = element.get_attribute(&ns!(""), &atom!("name")).r() {
+        if let Some(name) = element.get_attribute(&ns!(), &atom!("name")).r() {
             let name = name.value().to_ascii_lowercase();
             let name = name.trim_matches(HTML_SPACE_CHARACTERS);
 
@@ -64,7 +64,7 @@ impl HTMLMetaElement {
             return;
         }
         let element = self.upcast::<Element>();
-        if let Some(content) = element.get_attribute(&ns!(""), &atom!("content")).r() {
+        if let Some(content) = element.get_attribute(&ns!(), &atom!("content")).r() {
             let content = content.value();
             if !content.is_empty() {
                 if let Some(translated_rule) = ViewportRule::from_meta(&**content) {