Bug 1346693 - Part 2: stylo: Use namespace ids for content: attr(..); r=heycam

MozReview-Commit-ID: HdIffUCLHIy

layout/reftests/bugs/reftest.list

@@ -981,7 +981,7 @@ fuzzy-if(Android,11,17) == 413361-1.html 413361-1-ref.html # bug 1128229
 == 414123.xhtml 414123-ref.xhtml
 == 414638.html 414638-ref.html
 == 414851-1.html 414851-1-ref.html
-fails-if(styloVsGecko||stylo) == 416106-1.xhtml 416106-1-ref.xhtml
+== 416106-1.xhtml 416106-1-ref.xhtml
 == 416752-1.html 416752-1-ref.html
 == 417178-1.html 417178-1-ref.html
 == 417246-1.html 417246-1-ref.html

layout/style/ServoBindings.cpp

@@ -2239,6 +2239,23 @@ Gecko_AddPropertyToSet(nsCSSPropertyIDSetBorrowedMut aPropertySet,
   aPropertySet->AddProperty(aProperty);
 }
 
+int32_t
+Gecko_RegisterNamespace(nsIAtom* aNamespace)
+{
+  int32_t id;
+
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsAutoString str;
+  aNamespace->ToString(str);
+  nsresult rv = nsContentUtils::NameSpaceManager()->RegisterNameSpace(str, id);
+
+  if (NS_FAILED(rv)) {
+    return -1;
+  }
+  return id;
+}
+
 NS_IMPL_FFI_REFCOUNTING(nsCSSFontFaceRule, CSSFontFaceRule);
 
 nsCSSCounterStyleRule*

layout/style/ServoBindings.h

@@ -558,6 +558,10 @@ bool Gecko_MatchStringArgPseudo(RawGeckoElementBorrowed element,
 
 void Gecko_AddPropertyToSet(nsCSSPropertyIDSetBorrowedMut, nsCSSPropertyID);
 
+// Register a namespace and get a namespace id.
+// Returns -1 on error (OOM)
+int32_t Gecko_RegisterNamespace(nsIAtom* ns);
+
 // Style-struct management.
 #define STYLE_STRUCT(name, checkdata_cb)                                       \
   void Gecko_Construct_Default_nsStyle##name(                                  \