Bug 1344619 - Part 4: Add ServoStyleSet::ResolveStyleLazily(). r=heycam

MozReview-Commit-ID: GvlD6lQYBQ6

--HG--
extra : rebase_source : 73baac118a3de04d88b565c61f853ec145d3d1e7

layout/style/ServoStyleSet.cpp

@@ -140,8 +140,7 @@ ServoStyleSet::GetContext(nsIContent* aContent,
   ResolveMappedAttrDeclarationBlocks();
   RefPtr<ServoComputedValues> computedValues;
   if (aMayCompute == LazyComputeBehavior::Allow) {
-    computedValues =
-      Servo_ResolveStyleLazily(element, nullptr, mRawSet.get()).Consume();
+    computedValues = ResolveStyleLazily(element, nullptr);
   } else {
     computedValues = ResolveServoStyle(element);
   }
@@ -336,7 +335,7 @@ ServoStyleSet::ResolveTransientStyle(Element* aElement, CSSPseudoElementType aTy
   }
 
   RefPtr<ServoComputedValues> computedValues =
-    Servo_ResolveStyleLazily(aElement, pseudoTag, mRawSet.get()).Consume();
+    ResolveStyleLazily(aElement, pseudoTag);
 
   return GetContext(computedValues.forget(), nullptr, pseudoTag, aType,
                     nullptr);
@@ -705,4 +704,10 @@ ServoStyleSet::ClearNonInheritingStyleContexts()
   }  
 }
 
+already_AddRefed<ServoComputedValues>
+ServoStyleSet::ResolveStyleLazily(Element* aElement, nsIAtom* aPseudoTag)
+{
+  return Servo_ResolveStyleLazily(aElement, aPseudoTag, mRawSet.get()).Consume();
+}
+
 bool ServoStyleSet::sInServoTraversal = false;

layout/style/ServoStyleSet.h

@@ -270,6 +270,9 @@ private:
    */
   void PreTraverse();
 
+  already_AddRefed<ServoComputedValues> ResolveStyleLazily(dom::Element* aElement,
+                                                           nsIAtom* aPseudoTag);
+
   nsPresContext* mPresContext;
   UniquePtr<RawServoStyleSet> mRawSet;
   EnumeratedArray<SheetType, SheetType::Count,