DevTools: move InspectorStyleSheet::ensureSourceData to ParsedStyleSheet

Source/core/inspector/InspectorStyleSheet.h

Index: Source/core/inspector/InspectorStyleSheet.h
diff --git a/Source/core/inspector/InspectorStyleSheet.h b/Source/core/inspector/InspectorStyleSheet.h
index 65d439b10ef79a5e558b129aa69b079c214aff23..2b4254471681b712f38c827eb051e68f840d4889 100644
--- a/Source/core/inspector/InspectorStyleSheet.h
+++ b/Source/core/inspector/InspectorStyleSheet.h
@@ -172,7 +172,6 @@ public:
         virtual void didReparseStyleSheet() = 0;
     };
 
-    typedef HashMap<CSSStyleDeclaration*, RefPtr<InspectorStyle> > InspectorStyleMap;
     static PassRefPtr<InspectorStyleSheet> create(InspectorPageAgent*, InspectorResourceAgent*, const String& id, PassRefPtr<CSSStyleSheet> pageStyleSheet, TypeBuilder::CSS::StyleSheetOrigin::Enum, const String& documentURL, Listener*);
     static String styleSheetURL(CSSStyleSheet* pageStyleSheet);
     static void collectFlatRules(PassRefPtr<CSSRuleList>, CSSRuleVector* result);
@@ -227,7 +226,6 @@ private:
 
     bool checkPageStyleSheet(ExceptionState&) const;
     bool ensureText() const;
-    bool ensureSourceData();
     void ensureFlatRules() const;
     bool styleSheetTextWithChangedStyle(CSSStyleDeclaration*, const String& newStyleText, String* result);
     void revalidateStyle(CSSStyleDeclaration*);