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

chrome/browser/ui/webui/theme_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/theme_source.h"
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 161 matching lines @@
     return nullptr;
   }
 
   // If it's not a themeable image, we don't need to go to the UI thread.
   int resource_id = ResourcesUtil::GetThemeResourceId(parsed_path);
   return BrowserThemePack::IsPersistentImageID(resource_id)
              ? content::URLDataSource::TaskRunnerForRequestPath(path)
              : nullptr;
 }
 
+bool ThemeSource::AllowCaching() const {
+  return false;
+}
+
 bool ThemeSource::ShouldServiceRequest(const net::URLRequest* request) const {
   return request->url().SchemeIs(chrome::kChromeSearchScheme) ?
       InstantIOContext::ShouldServiceRequest(request) :
       URLDataSource::ShouldServiceRequest(request);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ThemeSource, private:
 
 void ThemeSource::SendThemeBitmap(
@@ skipping 28 matching lines @@
   } else {
     DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
     // Fetching image data in ResourceBundle should happen on the UI thread. See
     // crbug.com/449277
     content::BrowserThread::PostTaskAndReply(
         content::BrowserThread::UI, FROM_HERE,
         base::Bind(&ProcessResourceOnUiThread, resource_id, scale, data),
         base::Bind(callback, data));
   }
 }