Fix a crash when saving a <canvas> or <img> image which is large.

content/browser/renderer_host/render_message_filter.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
@@ skipping 69 matching lines @@
 class MediaInternals;
 class PluginServiceImpl;
 class RenderWidgetHelper;
 class ResourceContext;
 class ResourceDispatcherHostImpl;
 struct Referrer;
 struct WebPluginInfo;
 
 // This class filters out incoming IPC messages for the renderer process on the
 // IPC thread.
-class RenderMessageFilter : public BrowserMessageFilter {
+class CONTENT_EXPORT RenderMessageFilter : public BrowserMessageFilter {

[zino, 2014/09/17 06:30:44]

I think we should expose this class for using in unit test.

Similarly, the existing message filter classes are already exposed.
(such as FileAPIMessageFilter, MessagePortMessageFilter,
VideoCaptureMessageFilter and so on)

  public:
   // Create the filter.
   RenderMessageFilter(int render_process_id,
                       PluginServiceImpl * plugin_service,
                       BrowserContext* browser_context,
                       net::URLRequestContextGetter* request_context,
                       RenderWidgetHelper* render_widget_helper,
                       media::AudioManager* audio_manager,
                       MediaInternals* media_internals,
                       DOMStorageContextWrapper* dom_storage_context);
@@ skipping 10 matching lines @@
 
   bool OffTheRecord() const;
 
   int render_process_id() const { return render_process_id_; }
 
   // Returns the correct net::CookieStore depending on what type of url is
   // given.
   // Only call on the IO thread.
   net::CookieStore* GetCookieStoreForURL(const GURL& url);
 
+ protected:
+  virtual ~RenderMessageFilter();
+
+  // This method will be overridden by TestSaveImageFromDataURL class for test.
+  virtual void DownloadUrl(int render_view_id,
+                           const GURL& url,
+                           const Referrer& referrer,
+                           const base::string16& suggested_name,
+                           const bool use_prompt) const;
+
  private:
   friend class BrowserThread;
   friend class base::DeleteHelper<RenderMessageFilter>;
 
   class OpenChannelToNpapiPluginCallback;
 
-  virtual ~RenderMessageFilter();
-
   void OnGetProcessMemorySizes(size_t* private_bytes, size_t* shared_bytes);
   void OnCreateWindow(const ViewHostMsg_CreateWindow_Params& params,
                       int* route_id,
                       int* main_frame_route_id,
                       int* surface_id,
                       int64* cloned_session_storage_namespace_id);
   void OnCreateWidget(int opener_id,
                       blink::WebPopupType popup_type,
                       int* route_id,
                       int* surface_id);
@@ skipping 55 matching lines @@
   void OnDidDeleteOutOfProcessPepperInstance(int plugin_child_id,
                                              int32 pp_instance,
                                              bool is_external);
   void OnOpenChannelToPpapiBroker(int routing_id,
                                   const base::FilePath& path);
 #endif  // defined(ENABLE_PLUGINS)
   void OnGenerateRoutingID(int* route_id);
   void OnDownloadUrl(int render_view_id,
                      const GURL& url,
                      const Referrer& referrer,
-                     const base::string16& suggested_name,
-                     const bool use_prompt);
+                     const base::string16& suggested_name);
+  void OnSaveImageFromDataURL(int render_view_id, const std::string& url_str);
   void OnCheckNotificationPermission(const GURL& source_origin,
                                      int* permission_level);
 
   void OnGetCPUUsage(int* cpu_usage);
 
   void OnGetAudioHardwareConfig(media::AudioParameters* input_params,
                                 media::AudioParameters* output_params);
 
 #if defined(OS_WIN)
   // Used to look up the monitor color profile.
@@ skipping 123 matching lines @@
 #if defined(OS_MACOSX)
   base::ScopedCFTypeRef<IOSurfaceRef> last_io_surface_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(RenderMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_MESSAGE_FILTER_H_