Retrieve resources from media and supports query rules while serializing

Source/core/page/PageSerializer.h

Index: Source/core/page/PageSerializer.h
diff --git a/Source/core/page/PageSerializer.h b/Source/core/page/PageSerializer.h
index 52f43c9e0012ade9e08280728680b357d248e09e..3ce28aa5f2a3862668812198a0b36dd519c99242 100644
--- a/Source/core/page/PageSerializer.h
+++ b/Source/core/page/PageSerializer.h
@@ -45,6 +45,7 @@ namespace blink {
 class Attribute;
 class FontResource;
 class ImageResource;
+class CSSRule;
 class CSSStyleSheet;
 class CSSValue;
 class Document;
@@ -86,6 +87,9 @@ private:
     // It also adds any resources included in that stylesheet (including any imported stylesheets and their own resources).
     void serializeCSSStyleSheet(CSSStyleSheet&, const KURL&);
 
+    // Serializes the css rule (including any imported stylesheets), adding referenced resources.
+    void serializeCSSRule(CSSRule*);
+
     bool shouldAddURL(const KURL&);
 
     void addToResources(Resource *, PassRefPtr<SharedBuffer>, const KURL&);