Add force_compositing_mode support in gpu blacklist.

chrome/browser/ui/webui/gpu_internals_ui.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 "chrome/browser/ui/webui/gpu_internals_ui.h"
 
 #include <string>
 
 #if defined(OS_CHROMEOS)
 #include "ash/ash_switches.h"
@@ skipping 300 matching lines @@
           "panel_fitting",
           flags & content::GPU_FEATURE_TYPE_PANEL_FITTING,
 #if defined(OS_CHROMEOS)
           command_line.HasSwitch(ash::switches::kAshDisablePanelFitting),
 #else
           true,
 #endif
           "Panel fitting is unavailable, either disabled at the command"
           " line or not supported by the current system.",
           false
+      },
+      {
+          "force_compositing_mode",
+          flags & content::GPU_FEATURE_TYPE_FORCE_COMPOSITING_MODE,
+          !content::IsForceCompositingModeEnabled() &&
+          (flags & content::GPU_FEATURE_TYPE_FORCE_COMPOSITING_MODE) == 0,

[vangelis, 2013/01/16 18:04:09]

I think it would be more clear if the second part read:
!(flags & content::GPU_FEATURE_TYPE_FORCE_COMPOSITING_MODE)

[Zhenyao Mo, 2013/01/16 20:53:36]

Done.

+          "Force compositing mode is off, either disabled at the command"
+          " line or not supported by the current system.",
+          false
       }
   };
   const size_t kNumFeatures = sizeof(kGpuFeatureInfo) / sizeof(GpuFeatureInfo);
 
   // Build the feature_status field.
   {
     ListValue* feature_status_list = new ListValue();
 
     for (size_t i = 0; i < kNumFeatures; ++i) {
       std::string status;
@@ skipping 338 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 
 GpuInternalsUI::GpuInternalsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new GpuMessageHandler());
 
   // Set up the chrome://gpu-internals/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   ChromeURLDataManager::AddDataSource(profile, CreateGpuHTMLSource());
 }