Faster Reload: Specify AllowCaching = false for some URLDataSources that need it

chrome/browser/ui/webui/favicon_source.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/favicon_source.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 114 matching lines @@
         &cancelable_task_tracker_);
   }
 }
 
 std::string FaviconSource::GetMimeType(const std::string&) const {
   // We need to explicitly return a mime type, otherwise if the user tries to
   // drag the image they get no extension.
   return "image/png";
 }
 
+bool FaviconSource::AllowCaching() const {
+  return false;
+}
+
 bool FaviconSource::ShouldReplaceExistingSource() const {
   // Leave the existing DataSource in place, otherwise we'll drop any pending
   // requests on the floor.
   return false;
 }
 
 bool FaviconSource::ShouldServiceRequest(const net::URLRequest* request) const {
   if (request->url().SchemeIs(chrome::kChromeSearchScheme))
     return InstantIOContext::ShouldServiceRequest(request);
   return URLDataSource::ShouldServiceRequest(request);
@@ skipping 46 matching lines @@
       break;
   }
 
   base::RefCountedMemory* default_favicon =
       ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
           resource_id,
           ui::GetSupportedScaleFactor(icon_request.device_scale_factor));
 
   icon_request.callback.Run(default_favicon);
 }