Add GPU memory tab to the task manager.

chrome/browser/ui/webui/tracing_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/tracing_ui.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 72 matching lines @@
   virtual void FileSelectionCanceled(void* params);
 
   // TraceSubscriber implementation.
   virtual void OnEndTracingComplete();
   virtual void OnTraceDataCollected(
       const scoped_refptr<base::RefCountedString>& trace_fragment);
   virtual void OnTraceBufferPercentFullReply(float percent_full);
 
   // GpuDataManagerObserver implementation.
   virtual void OnGpuInfoUpdate() OVERRIDE;
+  virtual void OnVideoMemoryUsageStatsUpdate(
+      const content::GPUVideoMemoryUsageStats& video_memory) OVERRIDE {}
 
   // Messages.
   void OnTracingControllerInitialized(const ListValue* list);
   void OnBeginTracing(const ListValue* list);
   void OnEndTracingAsync(const ListValue* list);
   void OnBeginRequestBufferPercentFull(const ListValue* list);
   void OnLoadTraceFile(const ListValue* list);
   void OnSaveTraceFile(const ListValue* list);
 
   // Callbacks.
@@ skipping 433 matching lines @@
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 TracingUI::TracingUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new TracingMessageHandler());
 
   // Set up the chrome://tracing/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   ChromeURLDataManager::AddDataSource(profile, CreateTracingHTMLSource());
 }