Add property parser code path based on CSSParserTokenRange

Source/core/css/resolver/StyleBuilderCustom.cpp

Index: Source/core/css/resolver/StyleBuilderCustom.cpp
diff --git a/Source/core/css/resolver/StyleBuilderCustom.cpp b/Source/core/css/resolver/StyleBuilderCustom.cpp
index ebd5ed5d1efa43c4a51ad65617cc900d051f62d1..4e2890b223542c75a31a34dd92ff69fd0c158898 100644
--- a/Source/core/css/resolver/StyleBuilderCustom.cpp
+++ b/Source/core/css/resolver/StyleBuilderCustom.cpp
@@ -677,7 +677,7 @@ void StyleBuilderFunctions::applyValueCSSPropertyWillChange(StyleResolverState&
             willChangeContents = true;
         else if (primitiveValue->getValueID() == CSSValueScrollPosition)
             willChangeScrollPosition = true;
-        else
+        else if (primitiveValue->getValueID() != CSSValueAuto)

[alancutter (OOO until 2018), 2015/09/11 07:53:49]

It's weird to be changing behaviour in a refactor change. This should be moved
to a separate patch.
Also should there be updates to test cases if it's changing?

             ASSERT_NOT_REACHED();
     }
     state.style()->setWillChangeContents(willChangeContents);