Command line switch for canvas2d msaa

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 549 matching lines @@
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableAcceleratedCompositing);
   prefs.force_compositing_mode =
       content::IsForceCompositingModeEnabled() &&
       !command_line.HasSwitch(switches::kDisableForceCompositingMode);
   prefs.accelerated_2d_canvas_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableAccelerated2dCanvas);
   prefs.antialiased_2d_canvas_disabled =
       command_line.HasSwitch(switches::kDisable2dCanvasAntialiasing);
+  prefs.accelerated_2d_canvas_msaa_sample_count =
+      atoi(command_line.GetSwitchValueASCII(
+      switches::kAcceleratedCanvas2dMSAASampleCount).c_str());
   prefs.accelerated_filters_enabled =
       GpuProcessHost::gpu_enabled() &&
       command_line.HasSwitch(switches::kEnableAcceleratedFilters);
   prefs.accelerated_compositing_for_3d_transforms_enabled =
       prefs.accelerated_compositing_for_animation_enabled =
           !command_line.HasSwitch(switches::kDisableAcceleratedLayers);
   prefs.accelerated_compositing_for_plugins_enabled =
       !command_line.HasSwitch(switches::kDisableAcceleratedPlugins);
   prefs.accelerated_compositing_for_video_enabled =
       !command_line.HasSwitch(switches::kDisableAcceleratedVideo);
@@ skipping 3278 matching lines @@
 }
 
 void WebContentsImpl::OnFrameRemoved(
     RenderViewHostImpl* render_view_host,
     int64 frame_id) {
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      FrameDetached(render_view_host, frame_id));
 }
 
 }  // namespace content