Bug 978833 patch 17 - Remove Rule::mWasMatched. r=heycam

--HG--
extra : commitid : 61ndKkCSYPa

layout/style/Rule.h

@@ -36,8 +36,7 @@ protected:
     : mSheet(0),
       mParentRule(nullptr),
       mLineNumber(aLineNumber),
-      mColumnNumber(aColumnNumber),
-      mWasMatched(false)
+      mColumnNumber(aColumnNumber)
   {
   }
 
@@ -45,8 +44,7 @@ protected:
     : mSheet(aCopy.mSheet),
       mParentRule(aCopy.mParentRule),
       mLineNumber(aCopy.mLineNumber),
-      mColumnNumber(aCopy.mColumnNumber),
-      mWasMatched(false)
+      mColumnNumber(aCopy.mColumnNumber)
   {
   }
 
@@ -144,8 +142,7 @@ protected:
 
   // Keep the same type so that MSVC packs them.
   uint32_t          mLineNumber;
-  uint32_t          mColumnNumber : 31;
-  uint32_t          mWasMatched : 1;
+  uint32_t          mColumnNumber;
 };
 
 } // namespace css

layout/style/StyleRule.cpp

@@ -1450,10 +1450,6 @@ NS_IMPL_RELEASE(StyleRule)
 void
 StyleRule::RuleMatched()
 {
-  if (!mWasMatched) {
-    mWasMatched = true;
-  }
-
   mDeclaration->SetImmutable();
 }