Move Document global rule data to CSSGlobalRuleSet.

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

Index: third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
diff --git a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
index 19d1ebea6ceb4776ee21bf9878e242138e62b02a..1a2b48ee9bd2eb370ddb8d62904f4f479509865d 100644
--- a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
+++ b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.cpp
@@ -126,9 +126,9 @@ CSSDefaultStyleSheets::ensureTelevisionViewportStyleSheet() {
   return m_televisionViewportStyleSheet;
 }
 
-void CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(
-    const Element& element,
-    bool& changedDefaultStyle) {
+bool CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(
+    const Element& element) {
+  bool changedDefaultStyle = false;
   // FIXME: We should assert that the sheet only styles SVG elements.
   if (element.isSVGElement() && !m_svgStyleSheet) {
     m_svgStyleSheet = parseUASheet(loadResourceAsASCIIString("svg.css"));
@@ -161,6 +161,7 @@ void CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(
 
   ASSERT(!m_defaultStyle->features().hasIdsInSelectors());
   ASSERT(m_defaultStyle->features().siblingRules.isEmpty());
+  return changedDefaultStyle;
 }
 
 void CSSDefaultStyleSheets::ensureDefaultStyleSheetForFullscreen() {