Separate @viewport from other RuleSet construction.

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

Index: third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.h
diff --git a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.h b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.h
index c174300003154e3f1fd31833e878415edec69cb6..9b3fd6f31892a283841a0ff51ca3f4cd4435a466 100644
--- a/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.h
+++ b/third_party/WebKit/Source/core/css/CSSDefaultStyleSheets.h
@@ -47,11 +47,11 @@ class CSSDefaultStyleSheets : public GarbageCollected<CSSDefaultStyleSheets> {
   RuleSet* defaultQuirksStyle() { return m_defaultQuirksStyle.get(); }
   RuleSet* defaultPrintStyle() { return m_defaultPrintStyle.get(); }
   RuleSet* defaultViewSourceStyle();
-  RuleSet* defaultMobileViewportStyle();
-  RuleSet* defaultTelevisionViewportStyle();
 
+  StyleSheetContents* ensureMobileViewportStyleSheet();
+  StyleSheetContents* ensureTelevisionViewportStyleSheet();
   // FIXME: Remove WAP support.
-  RuleSet* defaultXHTMLMobileProfileStyle();
+  StyleSheetContents* ensureXHTMLMobileProfileStyleSheet();
 
   StyleSheetContents* defaultStyleSheet() { return m_defaultStyleSheet.get(); }
   StyleSheetContents* quirksStyleSheet() { return m_quirksStyleSheet.get(); }
@@ -70,16 +70,14 @@ class CSSDefaultStyleSheets : public GarbageCollected<CSSDefaultStyleSheets> {
   CSSDefaultStyleSheets();
 
   Member<RuleSet> m_defaultStyle;
-  Member<RuleSet> m_defaultMobileViewportStyle;
-  Member<RuleSet> m_defaultTelevisionViewportStyle;
   Member<RuleSet> m_defaultQuirksStyle;
   Member<RuleSet> m_defaultPrintStyle;
   Member<RuleSet> m_defaultViewSourceStyle;
-  Member<RuleSet> m_defaultXHTMLMobileProfileStyle;
 
   Member<StyleSheetContents> m_defaultStyleSheet;
   Member<StyleSheetContents> m_mobileViewportStyleSheet;
   Member<StyleSheetContents> m_televisionViewportStyleSheet;
+  Member<StyleSheetContents> m_xhtmlMobileProfileStyleSheet;
   Member<StyleSheetContents> m_quirksStyleSheet;
   Member<StyleSheetContents> m_svgStyleSheet;
   Member<StyleSheetContents> m_mathmlStyleSheet;