Remove CSSWillChange runtime flag (status=stable)

BUG=402536

Review URL: https://codereview.chromium.org/486563002

git-svn-id: svn://svn.chromium.org/blink/trunk@180429 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/css/RuntimeCSSEnabled.cpp

@@ -102,7 +102,6 @@ static void setPropertySwitchesFromRuntimeFeatures()
     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyMaskSourceType, RuntimeEnabledFeatures::cssMaskSourceTypeEnabled());
     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyColumnFill, RuntimeEnabledFeatures::regionBasedColumnsEnabled());
     RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyScrollBehavior, RuntimeEnabledFeatures::cssomSmoothScrollEnabled());
-    RuntimeCSSEnabled::setCSSPropertyEnabled(CSSPropertyWillChange, RuntimeEnabledFeatures::cssWillChangeEnabled());
 }
 
 static CSSPropertySwitches& propertySwitches()

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

@@ -1340,8 +1340,6 @@ bool CSSPropertyParser::parseValue(CSSPropertyID propId, bool important)
         parsedValue = parseColumnWidth();
         break;
     case CSSPropertyWillChange:
-        if (!RuntimeEnabledFeatures::cssWillChangeEnabled())
-            return false;
         return parseWillChange(important);
     // End of CSS3 properties
 
@@ -7281,8 +7279,6 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseImageSet(CSSParserValue
 
 bool CSSPropertyParser::parseWillChange(bool important)
 {
-    ASSERT(RuntimeEnabledFeatures::cssWillChangeEnabled());
-
     RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
     if (m_valueList->current()->id == CSSValueAuto) {
         if (m_valueList->next())

third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in

@@ -43,7 +43,6 @@ CSSMaskSourceType status=experimental
 CSSOMSmoothScroll status=experimental
 CSSTouchActionDelay status=test
 CSSViewport status=experimental
-CSSWillChange status=stable
 CSS3Text status=experimental
 CSS3TextDecorations status=experimental
 CompositedSelectionUpdates

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

@@ -46,7 +46,6 @@ void WebRuntimeFeatures::enableBleedingEdgeFastPaths(bool enable)
     ASSERT(enable);
     RuntimeEnabledFeatures::setBleedingEdgeFastPathsEnabled(enable);
     RuntimeEnabledFeatures::setSubpixelFontScalingEnabled(enable || RuntimeEnabledFeatures::subpixelFontScalingEnabled());
-    RuntimeEnabledFeatures::setCSSWillChangeEnabled(enable);
     RuntimeEnabledFeatures::setWebAnimationsAPIEnabled(enable);
 }