Bug 851892 part 4. Make css::Rule wrappercached. r=heycam,peterv

Note that this increases the size of css::Rule by three words, unfortunately.

dom/base/nsWrapperCache.h

@@ -19,10 +19,25 @@ namespace dom {
 class TabChildGlobal;
 class ProcessGlobal;
 } // namespace dom
+namespace css {
+class ImportRule;
+class NameSpaceRule;
+class StyleRule;
+class MediaRule;
+class DocumentRule;
+} // namespace css
+class ServoStyleRule;
+class CSSSupportsRule;
 } // namespace mozilla
 class SandboxPrivate;
 class nsInProcessTabChildGlobal;
 class nsWindowRoot;
+class nsCSSFontFaceRule;
+class nsCSSFontFeatureValuesRule;
+class nsCSSKeyframeRule;
+class nsCSSKeyframesRule;
+class nsCSSPageRule;
+class nsCSSCounterStyleRule;
 
 #define NS_WRAPPERCACHE_IID \
 { 0x6f3179a1, 0x36f7, 0x4a5c, \
@@ -272,11 +287,27 @@ protected:
   }
 
 private:
+  // Friend declarations for things that need to be able to call
+  // SetIsNotDOMBinding().  The goal is to get rid of all of these, and
+  // SetIsNotDOMBinding() too.
   friend class mozilla::dom::TabChildGlobal;
   friend class mozilla::dom::ProcessGlobal;
   friend class SandboxPrivate;
   friend class nsInProcessTabChildGlobal;
   friend class nsWindowRoot;
+  friend class mozilla::css::ImportRule;
+  friend class mozilla::css::NameSpaceRule;
+  friend class mozilla::css::StyleRule;
+  friend class mozilla::css::MediaRule;
+  friend class mozilla::css::DocumentRule;
+  friend class mozilla::ServoStyleRule;
+  friend class mozilla::CSSSupportsRule;
+  friend class nsCSSFontFaceRule;
+  friend class nsCSSFontFeatureValuesRule;
+  friend class nsCSSKeyframeRule;
+  friend class nsCSSKeyframesRule;
+  friend class nsCSSPageRule;
+  friend class nsCSSCounterStyleRule;
   void SetIsNotDOMBinding()
   {
     MOZ_ASSERT(!mWrapper && !(GetWrapperFlags() & ~WRAPPER_IS_NOT_DOM_BINDING),

layout/style/ImportRule.h

@@ -52,6 +52,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
   // nsIDOMCSSRule interface
   NS_DECL_NSIDOMCSSRULE
 

layout/style/NameSpaceRule.h

@@ -54,6 +54,9 @@ public:
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
     override MOZ_MUST_OVERRIDE;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
   // nsIDOMCSSRule interface
   NS_DECL_NSIDOMCSSRULE
 

layout/style/Rule.h

@@ -12,6 +12,7 @@
 #include "mozilla/MemoryReporting.h"
 #include "nsISupports.h"
 #include "nsIDOMCSSRule.h"
+#include "nsWrapperCache.h"
 
 class nsIDocument;
 struct nsRuleData;
@@ -29,7 +30,9 @@ class GroupRule;
   DECL_STYLE_RULE_INHERIT_NO_DOMRULE                       \
   virtual nsIDOMCSSRule* GetDOMRule() override;
 
-class Rule : public nsISupports {
+class Rule : public nsISupports
+           , public nsWrapperCache
+{
 protected:
   Rule(uint32_t aLineNumber, uint32_t aColumnNumber)
     : mSheet(nullptr),
@@ -52,7 +55,7 @@ protected:
 public:
 
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-  NS_DECL_CYCLE_COLLECTION_CLASS(Rule)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Rule)
 
 #ifdef DEBUG
   virtual void List(FILE* out = stdout, int32_t aIndent = 0) const = 0;

layout/style/ServoStyleRule.cpp

@@ -104,6 +104,7 @@ ServoStyleRule::ServoStyleRule(already_AddRefed<RawServoStyleRule> aRawRule)
   , mRawRule(aRawRule)
   , mDecls(Servo_StyleRule_GetStyle(mRawRule).Consume())
 {
+  SetIsNotDOMBinding();
 }
 
 // QueryInterface implementation for ServoStyleRule
@@ -152,6 +153,14 @@ ServoStyleRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return aMallocSizeOf(this);
 }
 
+/* virtual */ JSObject*
+ServoStyleRule::WrapObject(JSContext* aCx,
+                           JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 #ifdef DEBUG
 void
 ServoStyleRule::List(FILE* out, int32_t aIndent) const

layout/style/ServoStyleRule.h

@@ -66,6 +66,8 @@ public:
   already_AddRefed<Rule> Clone() const final;
   nsIDOMCSSRule* GetDOMRule() final { return this; }
   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const final;
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
 #ifdef DEBUG
   void List(FILE* out = stdout, int32_t aIndent = 0) const final;
 #endif

layout/style/StyleRule.cpp

@@ -1380,6 +1380,7 @@ StyleRule::StyleRule(nsCSSSelectorList* aSelector,
     mSelector(aSelector),
     mDeclaration(aDeclaration)
 {
+  SetIsNotDOMBinding();
   NS_PRECONDITION(aDeclaration, "must have a declaration");
 
   mDeclaration->SetOwningRule(this);
@@ -1391,6 +1392,7 @@ StyleRule::StyleRule(const StyleRule& aCopy)
     mSelector(aCopy.mSelector ? aCopy.mSelector->Clone() : nullptr),
     mDeclaration(new Declaration(*aCopy.mDeclaration))
 {
+  SetIsNotDOMBinding();
   mDeclaration->SetOwningRule(this);
   // rest is constructed lazily on existing data
 }
@@ -1574,6 +1576,14 @@ StyleRule::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
   return n;
 }
 
+/* virtual */ JSObject*
+StyleRule::WrapObject(JSContext* aCx,
+                      JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 
 } // namespace css
 } // namespace mozilla

layout/style/StyleRule.h

@@ -354,6 +354,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 private:
   ~StyleRule();
 

layout/style/nsCSSRules.cpp

@@ -57,10 +57,11 @@ NS_IMPL_CYCLE_COLLECTING_ADDREF(Rule)
 NS_IMPL_CYCLE_COLLECTING_RELEASE(Rule)
 
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Rule)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
   NS_INTERFACE_MAP_ENTRY(nsISupports)
 NS_INTERFACE_MAP_END
 
-NS_IMPL_CYCLE_COLLECTION_0(Rule)
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Rule)
 
 /* virtual */ void
 Rule::SetStyleSheet(StyleSheet* aSheet)
@@ -179,6 +180,7 @@ ImportRule::ImportRule(nsMediaList* aMedia, const nsString& aURLSpec,
   , mURLSpec(aURLSpec)
   , mMedia(aMedia)
 {
+  SetIsNotDOMBinding();
   // XXXbz This is really silly.... the mMedia here will be replaced
   // with itself if we manage to load a sheet.  Which should really
   // never fail nowadays, in sane cases.
@@ -188,6 +190,7 @@ ImportRule::ImportRule(const ImportRule& aCopy)
   : Rule(aCopy),
     mURLSpec(aCopy.mURLSpec)
 {
+  SetIsNotDOMBinding();
   // Whether or not an @import rule has a null sheet is a permanent
   // property of that @import rule, since it is null only if the target
   // sheet failed security checks.
@@ -357,6 +360,14 @@ ImportRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   // - mChildSheet, because it is measured via CSSStyleSheetInner::mSheets
 }
 
+/* virtual */ JSObject*
+ImportRule::WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 GroupRule::GroupRule(uint32_t aLineNumber, uint32_t aColumnNumber)
   : Rule(aLineNumber, aColumnNumber)
 {
@@ -588,11 +599,13 @@ GroupRule::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
 MediaRule::MediaRule(uint32_t aLineNumber, uint32_t aColumnNumber)
   : GroupRule(aLineNumber, aColumnNumber)
 {
+  SetIsNotDOMBinding();
 }
 
 MediaRule::MediaRule(const MediaRule& aCopy)
   : GroupRule(aCopy)
 {
+  SetIsNotDOMBinding();
   if (aCopy.mMedia) {
     mMedia = aCopy.mMedia->Clone();
     // XXXldb This doesn't really make sense.
@@ -803,6 +816,14 @@ MediaRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return n;
 }
 
+/* virtual */ JSObject*
+MediaRule::WrapObject(JSContext* aCx,
+                      JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 void
 MediaRule::AppendConditionText(nsAString& aOutput)
 {
@@ -816,12 +837,14 @@ MediaRule::AppendConditionText(nsAString& aOutput)
 DocumentRule::DocumentRule(uint32_t aLineNumber, uint32_t aColumnNumber)
   : GroupRule(aLineNumber, aColumnNumber)
 {
+  SetIsNotDOMBinding();
 }
 
 DocumentRule::DocumentRule(const DocumentRule& aCopy)
   : GroupRule(aCopy)
   , mURLs(new URL(*aCopy.mURLs))
 {
+  SetIsNotDOMBinding();
 }
 
 DocumentRule::~DocumentRule()
@@ -1044,6 +1067,14 @@ DocumentRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return n;
 }
 
+/* virtual */ JSObject*
+DocumentRule::WrapObject(JSContext* aCx,
+                         JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 void
 DocumentRule::AppendConditionText(nsAString& aCssText)
 {
@@ -1079,6 +1110,7 @@ NameSpaceRule::NameSpaceRule(nsIAtom* aPrefix, const nsString& aURLSpec,
     mPrefix(aPrefix),
     mURLSpec(aURLSpec)
 {
+  SetIsNotDOMBinding();
 }
 
 NameSpaceRule::NameSpaceRule(const NameSpaceRule& aCopy)
@@ -1086,6 +1118,7 @@ NameSpaceRule::NameSpaceRule(const NameSpaceRule& aCopy)
     mPrefix(aCopy.mPrefix),
     mURLSpec(aCopy.mURLSpec)
 {
+  SetIsNotDOMBinding();
 }
 
 NameSpaceRule::~NameSpaceRule()
@@ -1203,6 +1236,13 @@ NameSpaceRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   // - mURLSpec
 }
 
+/* virtual */ JSObject*
+NameSpaceRule::WrapObject(JSContext* aCx,
+                          JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
 
 } // namespace css
 } // namespace mozilla
@@ -1666,6 +1706,13 @@ nsCSSFontFaceRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   // - mDecl
 }
 
+/* virtual */ JSObject*
+nsCSSFontFaceRule::WrapObject(JSContext* aCx,
+                              JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
 
 // -----------------------------------
 // nsCSSFontFeatureValuesRule
@@ -1905,6 +1952,14 @@ nsCSSFontFeatureValuesRule::SizeOfIncludingThis(
   return aMallocSizeOf(this);
 }
 
+/* virtual */ JSObject*
+nsCSSFontFeatureValuesRule::WrapObject(JSContext* aCx,
+                                       JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 // -------------------------------------------
 // nsCSSKeyframeStyleDeclaration
 //
@@ -1983,6 +2038,7 @@ nsCSSKeyframeRule::nsCSSKeyframeRule(const nsCSSKeyframeRule& aCopy)
   , mKeys(aCopy.mKeys)
   , mDeclaration(new css::Declaration(*aCopy.mDeclaration))
 {
+  SetIsNotDOMBinding();
   mDeclaration->SetOwningRule(this);
 }
 
@@ -2192,6 +2248,13 @@ nsCSSKeyframeRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   // - mDOMDeclaration
 }
 
+/* virtual */ JSObject*
+nsCSSKeyframeRule::WrapObject(JSContext* aCx,
+                              JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
 
 // -------------------------------------------
 // nsCSSKeyframesRule
@@ -2204,6 +2267,7 @@ nsCSSKeyframesRule::nsCSSKeyframesRule(const nsCSSKeyframesRule& aCopy)
   : GroupRule(aCopy),
     mName(aCopy.mName)
 {
+  SetIsNotDOMBinding();
 }
 
 nsCSSKeyframesRule::~nsCSSKeyframesRule()
@@ -2443,6 +2507,14 @@ nsCSSKeyframesRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return n;
 }
 
+/* virtual */ JSObject*
+nsCSSKeyframesRule::WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 // -------------------------------------------
 // nsCSSPageStyleDeclaration
 //
@@ -2520,6 +2592,7 @@ nsCSSPageRule::nsCSSPageRule(const nsCSSPageRule& aCopy)
   : Rule(aCopy)
   , mDeclaration(new css::Declaration(*aCopy.mDeclaration))
 {
+  SetIsNotDOMBinding();
   mDeclaration->SetOwningRule(this);
 }
 
@@ -2661,6 +2734,14 @@ nsCSSPageRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return aMallocSizeOf(this);
 }
 
+/* virtual */ JSObject*
+nsCSSPageRule::WrapObject(JSContext* aCx,
+                          JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 namespace mozilla {
 
 CSSSupportsRule::CSSSupportsRule(bool aConditionMet,
@@ -2670,6 +2751,7 @@ CSSSupportsRule::CSSSupportsRule(bool aConditionMet,
   , mUseGroup(aConditionMet)
   , mCondition(aCondition)
 {
+  SetIsNotDOMBinding();
 }
 
 CSSSupportsRule::~CSSSupportsRule()
@@ -2681,6 +2763,7 @@ CSSSupportsRule::CSSSupportsRule(const CSSSupportsRule& aCopy)
     mUseGroup(aCopy.mUseGroup),
     mCondition(aCopy.mCondition)
 {
+  SetIsNotDOMBinding();
 }
 
 #ifdef DEBUG
@@ -2816,6 +2899,14 @@ CSSSupportsRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
   return n;
 }
 
+/* virtual */ JSObject*
+CSSSupportsRule::WrapObject(JSContext* aCx,
+                            JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}
+
 } // namespace mozilla
 
 // -------------------------------------------
@@ -2827,6 +2918,7 @@ nsCSSCounterStyleRule::nsCSSCounterStyleRule(const nsCSSCounterStyleRule& aCopy)
   , mName(aCopy.mName)
   , mGeneration(aCopy.mGeneration)
 {
+  SetIsNotDOMBinding();
   for (size_t i = 0; i < ArrayLength(mValues); ++i) {
     mValues[i] = aCopy.mValues[i];
   }
@@ -3275,3 +3367,11 @@ nsCSSCounterStyleRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
 {
   return aMallocSizeOf(this);
 }
+
+/* virtual */ JSObject*
+nsCSSCounterStyleRule::WrapObject(JSContext* aCx,
+                                  JS::Handle<JSObject*> aGivenProto)
+{
+  NS_NOTREACHED("We called SetIsNotDOMBinding() in our constructor");
+  return nullptr;
+}

layout/style/nsCSSRules.h

@@ -95,6 +95,9 @@ public:
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
     const override MOZ_MUST_OVERRIDE;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 protected:
   void AppendConditionText(nsAString& aOutput);
 
@@ -169,6 +172,9 @@ public:
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
     const override MOZ_MUST_OVERRIDE;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 protected:
   void AppendConditionText(nsAString& aOutput);
 
@@ -235,11 +241,17 @@ class nsCSSFontFaceRule final : public mozilla::css::Rule,
 {
 public:
   nsCSSFontFaceRule(uint32_t aLineNumber, uint32_t aColumnNumber)
-    : mozilla::css::Rule(aLineNumber, aColumnNumber) {}
+    : mozilla::css::Rule(aLineNumber, aColumnNumber)
+  {
+    SetIsNotDOMBinding();
+  }
 
   nsCSSFontFaceRule(const nsCSSFontFaceRule& aCopy)
     // copy everything except our reference count
-    : mozilla::css::Rule(aCopy), mDecl(aCopy.mDecl) {}
+    : mozilla::css::Rule(aCopy), mDecl(aCopy.mDecl)
+  {
+    SetIsNotDOMBinding();
+  }
 
   NS_DECL_ISUPPORTS_INHERITED
   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(nsCSSFontFaceRule,
@@ -264,6 +276,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
   void GetDescriptors(mozilla::CSSFontFaceDescriptors& aDescriptors) const
     { aDescriptors = mDecl.mDescriptors; }
 
@@ -300,13 +315,19 @@ class nsCSSFontFeatureValuesRule final : public mozilla::css::Rule,
 {
 public:
   nsCSSFontFeatureValuesRule(uint32_t aLineNumber, uint32_t aColumnNumber)
-    : mozilla::css::Rule(aLineNumber, aColumnNumber) {}
+    : mozilla::css::Rule(aLineNumber, aColumnNumber)
+  {
+    SetIsNotDOMBinding();
+  }
 
   nsCSSFontFeatureValuesRule(const nsCSSFontFeatureValuesRule& aCopy)
     // copy everything except our reference count
     : mozilla::css::Rule(aCopy),
       mFamilyList(aCopy.mFamilyList),
-      mFeatureValues(aCopy.mFeatureValues) {}
+      mFeatureValues(aCopy.mFeatureValues)
+  {
+    SetIsNotDOMBinding();
+  }
 
   NS_DECL_ISUPPORTS_INHERITED
 
@@ -337,6 +358,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 protected:
   ~nsCSSFontFeatureValuesRule() {}
 
@@ -384,6 +408,7 @@ public:
     , mKeys(mozilla::Move(aKeys))
     , mDeclaration(mozilla::Move(aDeclaration))
   {
+    SetIsNotDOMBinding();
     mDeclaration->SetOwningRule(this);
   }
 private:
@@ -414,6 +439,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
   void DoGetKeyText(nsAString &aKeyText) const;
 
 private:
@@ -432,6 +460,7 @@ public:
     : mozilla::css::GroupRule(aLineNumber, aColumnNumber)
     , mName(aName)
   {
+    SetIsNotDOMBinding();
   }
 private:
   nsCSSKeyframesRule(const nsCSSKeyframesRule& aCopy);
@@ -464,6 +493,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 private:
   uint32_t FindRuleIndexForKey(const nsAString& aKey);
 
@@ -507,6 +539,7 @@ public:
     : mozilla::css::Rule(aLineNumber, aColumnNumber)
     , mDeclaration(aDeclaration)
   {
+    SetIsNotDOMBinding();
     mDeclaration->SetOwningRule(this);
   }
 private:
@@ -535,6 +568,10 @@ public:
   void ChangeDeclaration(mozilla::css::Declaration* aDeclaration);
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 private:
   RefPtr<mozilla::css::Declaration>     mDeclaration;
   // lazily created when needed:
@@ -543,7 +580,7 @@ private:
 
 namespace mozilla {
 
-class CSSSupportsRule : public css::GroupRule,
+class CSSSupportsRule final : public css::GroupRule,
                               public nsIDOMCSSSupportsRule
 {
 public:
@@ -580,6 +617,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 protected:
   virtual ~CSSSupportsRule();
 
@@ -599,6 +639,7 @@ public:
     , mName(aName)
     , mGeneration(0)
   {
+    SetIsNotDOMBinding();
   }
 
 private:
@@ -646,6 +687,9 @@ public:
 
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;
 
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
 private:
   typedef NS_STDCALL_FUNCPROTO(nsresult, Getter, nsCSSCounterStyleRule,
                                GetSymbols, (nsAString&));