Add GPU memory tab to the task manager.

content/public/common/gpu_info.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/public/common/gpu_info.h"
 
 namespace content {
 
 GPUInfo::GPUDevice::GPUDevice()
     : vendor_id(0),
       device_id(0) {
 }
 
 GPUInfo::GPUDevice::~GPUDevice() { }
 
 GPUInfo::GPUInfo()
     : finalized(false),
       optimus(false),
       amd_switchable(false),
       can_lose_context(false),
       gpu_accessible(true),
       software_rendering(false) {
 }
 
 GPUInfo::~GPUInfo() { }
 
+GPUVidmem::GPUVidmem() { }
+
+GPUVidmem::~GPUVidmem() { }
+
+GPUVidmem::GPUProcessVidmem::GPUProcessVidmem()
+    : vidmem(0),
+      has_duplicates(false) {
+}
+
+GPUVidmem::GPUProcessVidmem::~GPUProcessVidmem() { }
+
 }  // namespace content