Sample code: IPC Transport object for GPU

base/threading/thread_restrictions.h

 // 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.
 
 #ifndef BASE_THREADING_THREAD_RESTRICTIONS_H_
 #define BASE_THREADING_THREAD_RESTRICTIONS_H_
 
 #include "base/base_export.h"
 #include "base/macros.h"
 
@@ skipping 20 matching lines @@
 }
 }
 namespace chrome_browser_net {
 class Predictor;
 }
 namespace content {
 class BrowserGpuChannelHostFactory;
 class BrowserGpuMemoryBufferManager;
 class BrowserShutdownProfileDumper;
 class BrowserTestBase;
+class ChromeGpuChannelHostIPCTransport;
 class GpuChannelHost;
 class NestedMessagePumpAndroid;
 class ScopedAllowWaitForAndroidLayoutTests;
 class ScopedAllowWaitForDebugURL;
 class SoftwareOutputDeviceMus;
 class TextInputClientMac;
 class RasterWorkerPool;
 }  // namespace content
 namespace dbus {
 class Bus;
@@ skipping 163 matching lines @@
 
   // END ALLOWED USAGE.
   // BEGIN USAGE THAT NEEDS TO BE FIXED.
   friend class ::chromeos::BlockingMethodCaller;  // http://crbug.com/125360
   friend class ::chromeos::system::StatisticsProviderImpl;  // http://crbug.com/125385
   friend class chrome_browser_net::Predictor;     // http://crbug.com/78451
   friend class
       content::BrowserGpuChannelHostFactory;      // http://crbug.com/125248
   friend class
       content::BrowserGpuMemoryBufferManager;     // http://crbug.com/420368
+  friend class content::ChromeGpuChannelHostIPCTransport;
   friend class content::GpuChannelHost;           // http://crbug.com/125264
   friend class content::TextInputClientMac;       // http://crbug.com/121917
   friend class dbus::Bus;                         // http://crbug.com/125222
   friend class disk_cache::BackendImpl;           // http://crbug.com/74623
   friend class disk_cache::InFlightIO;            // http://crbug.com/74623
   friend class net::internal::AddressTrackerLinux;  // http://crbug.com/125097
   friend class net::NetworkChangeNotifierMac;     // http://crbug.com/125097
   friend class ::BrowserProcessImpl;              // http://crbug.com/125207
   friend class ::NativeBackendKWallet;            // http://crbug.com/125331
 #if !defined(OFFICIAL_BUILD)
@@ skipping 23 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(ScopedAllowWait);
   };
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadRestrictions);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_THREAD_RESTRICTIONS_H_