Bug 1247182 - Add an nsCSSRuleProcessor constructor that takes ownership of the given sheet array. r=birtles

dom/xbl/nsXBLPrototypeResources.cpp

@@ -154,7 +154,7 @@ nsXBLPrototypeResources::GatherRuleProcessor()
                "backends");
     sheets.AppendElement(sheet->AsGecko());
   }
-  mRuleProcessor = new nsCSSRuleProcessor(sheets,
+  mRuleProcessor = new nsCSSRuleProcessor(Move(sheets),
                                           SheetType::Doc,
                                           nullptr,
                                           mRuleProcessor);

layout/style/nsCSSRuleProcessor.cpp

@@ -984,6 +984,17 @@ nsCSSRuleProcessor::nsCSSRuleProcessor(const sheet_array_type& aSheets,
                                        nsCSSRuleProcessor*
                                          aPreviousCSSRuleProcessor,
                                        bool aIsShared)
+  : nsCSSRuleProcessor(sheet_array_type(aSheets), aSheetType, aScopeElement,
+                       aPreviousCSSRuleProcessor, aIsShared)
+{
+}
+
+nsCSSRuleProcessor::nsCSSRuleProcessor(sheet_array_type&& aSheets,
+                                       SheetType aSheetType,
+                                       Element* aScopeElement,
+                                       nsCSSRuleProcessor*
+                                         aPreviousCSSRuleProcessor,
+                                       bool aIsShared)
   : mSheets(aSheets)
   , mRuleCascades(nullptr)
   , mPreviousCacheKey(aPreviousCSSRuleProcessor

layout/style/nsCSSRuleProcessor.h

@@ -69,6 +69,11 @@ public:
                      mozilla::dom::Element* aScopeElement,
                      nsCSSRuleProcessor* aPreviousCSSRuleProcessor,
                      bool aIsShared = false);
+  nsCSSRuleProcessor(sheet_array_type&& aSheets,
+                     mozilla::SheetType aSheetType,
+                     mozilla::dom::Element* aScopeElement,
+                     nsCSSRuleProcessor* aPreviousCSSRuleProcessor,
+                     bool aIsShared = false);
 
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
   NS_DECL_CYCLE_COLLECTION_CLASS(nsCSSRuleProcessor)

layout/style/nsStyleSet.cpp

@@ -510,7 +510,7 @@ nsStyleSet::GatherRuleProcessors(SheetType aType)
         sheetsForScope.AppendElements(sheets.Elements() + start, end - start);
         nsCSSRuleProcessor* oldRP = oldScopedRuleProcessorHash.Get(scope);
         mScopedDocSheetRuleProcessors.AppendElement
-          (new nsCSSRuleProcessor(sheetsForScope, aType, scope, oldRP));
+          (new nsCSSRuleProcessor(Move(sheetsForScope), aType, scope, oldRP));
 
         start = end;
       } while (start < count);