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

chrome/browser/ui/webui/fallback_icon_source.cc

Index: chrome/browser/ui/webui/fallback_icon_source.cc
diff --git a/chrome/browser/ui/webui/fallback_icon_source.cc b/chrome/browser/ui/webui/fallback_icon_source.cc
index c282ed0884f9fb57638e10f527bfddcc84f26ecd..6c93999b7f687214a1aeaab08d96a7868fd24048 100644
--- a/chrome/browser/ui/webui/fallback_icon_source.cc
+++ b/chrome/browser/ui/webui/fallback_icon_source.cc
@@ -66,10 +66,14 @@ bool FallbackIconSource::ShouldReplaceExistingSource() const {
 }
 
 bool FallbackIconSource::ShouldServiceRequest(
-    const net::URLRequest* request) const {
-  if (request->url().SchemeIs(chrome::kChromeSearchScheme))
-    return InstantIOContext::ShouldServiceRequest(request);
-  return URLDataSource::ShouldServiceRequest(request);
+    const GURL& url,
+    content::ResourceContext* resource_context,
+    int render_process_id) const {
+  if (url.SchemeIs(chrome::kChromeSearchScheme))
+    return InstantIOContext::ShouldServiceRequest(url, resource_context,
+                                                  render_process_id);
+  return URLDataSource::ShouldServiceRequest(url, resource_context,
+                                             render_process_id);
 }
 
 void FallbackIconSource::SendFallbackIconHelper(