Remove will-change: contents GPU rasterization hint

Source/core/rendering/style/RenderStyle.cpp

Index: Source/core/rendering/style/RenderStyle.cpp
diff --git a/Source/core/rendering/style/RenderStyle.cpp b/Source/core/rendering/style/RenderStyle.cpp
index dfeb3bed61f5b2ce8ec111e0e8193140b5c768cd..108339c9af80506244571f5352c84493cfd3ac93 100644
--- a/Source/core/rendering/style/RenderStyle.cpp
+++ b/Source/core/rendering/style/RenderStyle.cpp
@@ -659,8 +659,7 @@ bool RenderStyle::diffNeedsRecompositeLayer(const RenderStyle& other) const
             || rareNonInheritedData->m_perspective != other.rareNonInheritedData->m_perspective
             || rareNonInheritedData->m_perspectiveOriginX != other.rareNonInheritedData->m_perspectiveOriginX
             || rareNonInheritedData->m_perspectiveOriginY != other.rareNonInheritedData->m_perspectiveOriginY
-            || hasWillChangeCompositingHint() != other.hasWillChangeCompositingHint()
-            || hasWillChangeGpuRasterizationHint() != other.hasWillChangeGpuRasterizationHint())
+            || hasWillChangeCompositingHint() != other.hasWillChangeCompositingHint())
             return true;
     }
 
@@ -883,25 +882,6 @@ bool RenderStyle::hasWillChangeCompositingHint() const
     return false;
 }
 
-bool RenderStyle::hasWillChangeGpuRasterizationHint() const
-{
-    if (willChangeContents())
-        return true;
-
-    for (size_t i = 0; i < rareNonInheritedData->m_willChange->m_properties.size(); ++i) {
-        switch (rareNonInheritedData->m_willChange->m_properties[i]) {
-        case CSSPropertyWidth:
-        case CSSPropertyHeight:
-        case CSSPropertyBackgroundColor:
-        case CSSPropertyBackgroundPosition:
-            return true;
-        default:
-            break;
-        }
-    }
-    return false;
-}
-
 inline bool requireTransformOrigin(const Vector<RefPtr<TransformOperation> >& transformOperations, RenderStyle::ApplyTransformOrigin applyOrigin)
 {
     // transform-origin brackets the transform with translate operations.