Add "panel_fitting" GPU feature type and use it for mirror mode.

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>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 265 matching lines @@
           " about:flags or command line.",
           false
       },
       {
           "video_decode",
           flags & content::GPU_FEATURE_TYPE_ACCELERATED_VIDEO_DECODE,
           command_line.HasSwitch(switches::kDisableAcceleratedVideoDecode),
           "Accelerated video decode has been disabled, either via about:flags"
           " or command line.",
           true
+      },
+      {
+          "panel_fitting",
+          flags & content::GPU_FEATURE_TYPE_PANEL_FITTING,
+          command_line.HasSwitch(switches::kDisablePanelFitting),
+          "Panel fitting is unavailable, 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 324 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());
 }