Generalize content::URLDataSource so that it can be used by the network service.

chrome/browser/search/iframe_source.h

Index: chrome/browser/search/iframe_source.h
diff --git a/chrome/browser/search/iframe_source.h b/chrome/browser/search/iframe_source.h
index 4618389dc63a7b8b7904c24c8347e92c9f86f20c..a71dabbc489503a24d6c03f6942112a633b121f6 100644
--- a/chrome/browser/search/iframe_source.h
+++ b/chrome/browser/search/iframe_source.h
@@ -20,7 +20,9 @@ class IframeSource : public content::URLDataSource {
   std::string GetMimeType(const std::string& path_and_query) const override;
   bool AllowCaching() const override;
   bool ShouldDenyXFrameOptions() const override;
-  bool ShouldServiceRequest(const net::URLRequest* request) const override;
+  bool ShouldServiceRequest(const GURL& url,
+                            content::ResourceContext* resource_context,
+                            int render_process_id) const override;
 
   // Returns whether this source should serve data for a particular path.
   virtual bool ServesPath(const std::string& path) const = 0;