Introduce ResourceRequesterInfo to abstract the requester of resource request

content/browser/loader/resource_handler.h

Index: content/browser/loader/resource_handler.h
diff --git a/content/browser/loader/resource_handler.h b/content/browser/loader/resource_handler.h
index 02ef6b87f1244c7ec59f012aefe9a1342ac8f588..57f51681b39468701b399f53af172b8343d0cc5e 100644
--- a/content/browser/loader/resource_handler.h
+++ b/content/browser/loader/resource_handler.h
@@ -29,8 +29,8 @@ struct RedirectInfo;
 }  // namespace net
 
 namespace content {
+class BrowserMessageFilter;
 class ResourceController;
-class ResourceMessageFilter;
 class ResourceRequestInfoImpl;
 struct ResourceResponse;
 
@@ -109,7 +109,7 @@ class CONTENT_EXPORT ResourceHandler
   // Convenience functions.
   ResourceRequestInfoImpl* GetRequestInfo() const;
   int GetRequestID() const;
-  ResourceMessageFilter* GetFilter() const;
+  BrowserMessageFilter* GetFilter() const;
 
  private:
   ResourceController* controller_;