Turning on accelerated layers by default

chrome/browser/tab_contents/render_view_host_delegate_helper.cc

 // Copyright (c) 2011 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/tab_contents/render_view_host_delegate_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/string_util.h"
@@ skipping 276 matching lines @@
         command_line.HasSwitch(switches::kAllowFileAccessFromFiles);
     web_prefs.show_composited_layer_borders =
         command_line.HasSwitch(switches::kShowCompositedLayerBorders);
     web_prefs.accelerated_compositing_enabled =
         gpu_enabled() &&
         !command_line.HasSwitch(switches::kDisableAcceleratedCompositing);
     web_prefs.accelerated_2d_canvas_enabled =
         gpu_enabled() &&
         command_line.HasSwitch(switches::kEnableAccelerated2dCanvas);
     web_prefs.accelerated_layers_enabled =
-        command_line.HasSwitch(switches::kEnableAcceleratedLayers);
+        !command_line.HasSwitch(switches::kDisableAcceleratedLayers);
     web_prefs.accelerated_plugins_enabled =
         command_line.HasSwitch(switches::kEnableAcceleratedPlugins);
     web_prefs.accelerated_video_enabled =
         !command_line.HasSwitch(switches::kDisableAcceleratedVideo);
     web_prefs.memory_info_enabled =
         command_line.HasSwitch(switches::kEnableMemoryInfo);
     web_prefs.hyperlink_auditing_enabled =
         !command_line.HasSwitch(switches::kNoPings);
     web_prefs.interactive_form_validation_enabled =
         !command_line.HasSwitch(switches::kDisableInteractiveFormValidation);
@@ skipping 38 matching lines @@
   inspector_settings->SetWithoutPathExpansion(key,
                                               Value::CreateStringValue(value));
 }
 
 void RenderViewHostDelegateHelper::ClearInspectorSettings(Profile* profile) {
   DictionaryValue* inspector_settings =
       profile->GetPrefs()->GetMutableDictionary(
           prefs::kWebKitInspectorSettings);
   inspector_settings->Clear();
 }