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

chrome/browser/ui/webui/fallback_icon_source.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_FALLBACK_ICON_SOURCE_H_
 #define CHROME_BROWSER_UI_WEBUI_FALLBACK_ICON_SOURCE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 48 matching lines @@
 
   ~FallbackIconSource() override;
 
   // content::URLDataSource implementation.
   std::string GetSource() const override;
   void StartDataRequest(
       const std::string& path,
       const content::ResourceRequestInfo::WebContentsGetter& wc_getter,
       const content::URLDataSource::GotDataCallback& callback) override;
   std::string GetMimeType(const std::string&) const override;
+  bool AllowCaching() const override;
   bool ShouldReplaceExistingSource() const override;
   bool ShouldServiceRequest(const net::URLRequest* request) const override;
 
  private:
   void SendFallbackIconHelper(
       const GURL& url,
       int size_in_pixels,
       const favicon_base::FallbackIconStyle& style,
       const content::URLDataSource::GotDataCallback& callback);
 
   // Sends the default fallback icon.
   void SendDefaultResponse(
       const content::URLDataSource::GotDataCallback& callback);
 
   favicon::FallbackIconService* fallback_icon_service_;
 
   DISALLOW_COPY_AND_ASSIGN(FallbackIconSource);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_FALLBACK_ICON_SOURCE_H_