CL for perf tryjob on win

Source/core/editing/ApplyStyleCommand.cpp

Index: Source/core/editing/ApplyStyleCommand.cpp
diff --git a/Source/core/editing/ApplyStyleCommand.cpp b/Source/core/editing/ApplyStyleCommand.cpp
index e9a151cf0ee1ba190d8f9c65209dbbb5a4c6d8be..8fabf9b0d356d6f326ed5e5475d96c499c802e92 100644
--- a/Source/core/editing/ApplyStyleCommand.cpp
+++ b/Source/core/editing/ApplyStyleCommand.cpp
@@ -414,7 +414,7 @@ void ApplyStyleCommand::applyRelativeFontStyleChange(EditingStyle* style)
         RefPtrWillBeRawPtr<MutableStylePropertySet> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());
         float currentFontSize = computedFontSize(node);
         float desiredFontSize = max(MinimumFontSize, startingFontSizes.get(node) + style->fontSizeDelta());
-        RefPtrWillBeRawPtr<CSSValue> value = inlineStyle->getPropertyCSSValue(CSSPropertyFontSize);
+        NullableCSSValue value = inlineStyle->getPropertyCSSValue(CSSPropertyFontSize);
         if (value) {
             element->removeInlineStyleProperty(CSSPropertyFontSize);
             currentFontSize = computedFontSize(node);
@@ -1544,12 +1544,13 @@ float ApplyStyleCommand::computedFontSize(Node* node)
     if (!style)
         return 0;
 
-    RefPtrWillBeRawPtr<CSSPrimitiveValue> value = static_pointer_cast<CSSPrimitiveValue>(style->getPropertyCSSValue(CSSPropertyFontSize));
+    NullableCSSValue value = style->getPropertyCSSValue(CSSPropertyFontSize);
     if (!value)
         return 0;
 
-    ASSERT(value->primitiveType() == CSSPrimitiveValue::CSS_PX);
-    return value->getFloatValue();
+    CSSPrimitiveValue& primitiveValue = toCSSPrimitiveValue(*value);
+    ASSERT(primitiveValue.primitiveType() == CSSPrimitiveValue::CSS_PX);
+    return primitiveValue.getFloatValue();
 }
 
 void ApplyStyleCommand::joinChildTextNodes(ContainerNode* node, const Position& start, const Position& end)