DevTools: allow injecting CSS rules without breaking styles sidebar.

Source/core/css/parser/CSSParser.h

Index: Source/core/css/parser/CSSParser.h
diff --git a/Source/core/css/parser/CSSParser.h b/Source/core/css/parser/CSSParser.h
index f728ca1e6beace0195deb9a83edf74ac07ea3a64..b421b870ba780b151d9c230d59725b195f158124 100644
--- a/Source/core/css/parser/CSSParser.h
+++ b/Source/core/css/parser/CSSParser.h
@@ -53,7 +53,7 @@ public:
     static bool parseSystemColor(RGBA32& color, const String&);
     static StyleColor colorFromRGBColorString(const String&);
 
-    static void parseSheetForInspector(const CSSParserContext&, const String&, CSSParserObserver&);
+    static void parseSheetForInspector(const CSSParserContext&, StyleSheetContents*, const String&, CSSParserObserver&);

[pfeldman, 2015/06/25 17:52:32]

@timloh: I now need StyleSheetContents* as a result of this. What do you want me
to do to this signature? Should it be merged with parseSheet and get a nullable
observer?

     static void parseDeclarationListForInspector(const CSSParserContext&, const String&, CSSParserObserver&);
 
 private: