Add a command line switch to control accelerated 2d canvas

chrome/common/render_messages.h

 // Copyright (c) 2010 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_COMMON_RENDER_MESSAGES_H_
 #define CHROME_COMMON_RENDER_MESSAGES_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 2031 matching lines @@
     WriteParam(m, p.application_cache_enabled);
     WriteParam(m, p.tabs_to_links);
     WriteParam(m, p.user_style_sheet_enabled);
     WriteParam(m, p.user_style_sheet_location);
     WriteParam(m, p.author_and_user_styles_enabled);
     WriteParam(m, p.allow_universal_access_from_file_urls);
     WriteParam(m, p.allow_file_access_from_file_urls);
     WriteParam(m, p.experimental_webgl_enabled);
     WriteParam(m, p.show_composited_layer_borders);
     WriteParam(m, p.accelerated_compositing_enabled);
+    WriteParam(m, p.accelerated_2d_canvas_enabled);
     WriteParam(m, p.memory_info_enabled);
   }
   static bool Read(const Message* m, void** iter, param_type* p) {
     return
         ReadParam(m, iter, &p->standard_font_family) &&
         ReadParam(m, iter, &p->fixed_font_family) &&
         ReadParam(m, iter, &p->serif_font_family) &&
         ReadParam(m, iter, &p->sans_serif_font_family) &&
         ReadParam(m, iter, &p->cursive_font_family) &&
         ReadParam(m, iter, &p->fantasy_font_family) &&
@@ skipping 25 matching lines @@
         ReadParam(m, iter, &p->application_cache_enabled) &&
         ReadParam(m, iter, &p->tabs_to_links) &&
         ReadParam(m, iter, &p->user_style_sheet_enabled) &&
         ReadParam(m, iter, &p->user_style_sheet_location) &&
         ReadParam(m, iter, &p->author_and_user_styles_enabled) &&
         ReadParam(m, iter, &p->allow_universal_access_from_file_urls) &&
         ReadParam(m, iter, &p->allow_file_access_from_file_urls) &&
         ReadParam(m, iter, &p->experimental_webgl_enabled) &&
         ReadParam(m, iter, &p->show_composited_layer_borders) &&
         ReadParam(m, iter, &p->accelerated_compositing_enabled) &&
+        ReadParam(m, iter, &p->accelerated_2d_canvas_enabled) &&
         ReadParam(m, iter, &p->memory_info_enabled);
   }
   static void Log(const param_type& p, std::wstring* l) {
     l->append(L"<WebPreferences>");
   }
 };
 
 // Traits for WebDropData
 template <>
 struct ParamTraits<WebDropData> {
@@ skipping 1195 matching lines @@
     l->append(L")");
   }
 };
 
 }  // namespace IPC
 
 #define MESSAGES_INTERNAL_FILE "chrome/common/render_messages_internal.h"
 #include "ipc/ipc_message_macros.h"
 
 #endif  // CHROME_COMMON_RENDER_MESSAGES_H_