Add GPU memory tab to the task manager.

chrome/browser/component_updater/swiftshader_component_installer.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/component_updater/swiftshader_component_installer.h"
 
 #include "base/bind.h"
 #include "base/base_paths.h"
 #include "base/compiler_specific.h"
 #include "base/cpu.h"
@@ skipping 147 matching lines @@
   if (cus->RegisterComponent(swiftshader) != ComponentUpdateService::kOk) {
     NOTREACHED() << "SwiftShader component registration fail";
   }
 }
 
 class UpdateChecker : public content::GpuDataManagerObserver {
  public:
   explicit UpdateChecker(ComponentUpdateService* cus);
 
   virtual void OnGpuInfoUpdate() OVERRIDE;
+  virtual void OnVidmemUsageStatsUpdate(
+      const content::GPUVidmemUsageStats& vidmem_usage_stats) OVERRIDE {}
 
  private:
   ComponentUpdateService* cus_;
 };
 
 UpdateChecker::UpdateChecker(ComponentUpdateService* cus)
   : cus_(cus) {
 }
 
 void UpdateChecker::OnGpuInfoUpdate() {
@@ skipping 49 matching lines @@
 void RegisterSwiftShaderComponent(ComponentUpdateService* cus) {
 #if defined(ENABLE_SWIFTSHADER)
   base::CPU cpu;
 
   if (!cpu.has_sse2())
     return;
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
       base::Bind(&RegisterSwiftShaderPath, cus));
 #endif
 }