ipc: Use a global for the process's attachment broker.

content/gpu/gpu_child_thread.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/gpu/gpu_child_thread.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/threading/worker_pool.h"
 #include "build/build_config.h"
@@ skipping 243 matching lines @@
   if (!in_browser_process_)
     logging::SetLogMessageHandler(GpuProcessLogMessageHandler);
 
   // Defer creation of the render thread. This is to prevent it from handling
   // IPC messages before the sandbox has been enabled and all other necessary
   // initialization has succeeded.
   gpu_channel_manager_.reset(new GpuChannelManager(
       channel(), watchdog_thread_.get(),
       base::ThreadTaskRunnerHandle::Get().get(),
       ChildProcess::current()->io_task_runner(),
-      ChildProcess::current()->GetShutDownEvent(), GetAttachmentBroker(),
+      ChildProcess::current()->GetShutDownEvent(),
       sync_point_manager_, gpu_memory_buffer_factory_));
 
 #if defined(USE_OZONE)
   ui::OzonePlatform::GetInstance()
       ->GetGpuPlatformSupport()
       ->OnChannelEstablished(this);
 #endif
 }
 
 void GpuChildThread::OnFinalize() {
@@ skipping 93 matching lines @@
   }
 }
 
 void GpuChildThread::OnGpuSwitched() {
   DVLOG(1) << "GPU: GPU has switched";
   // Notify observers in the GPU process.
   ui::GpuSwitchingManager::GetInstance()->NotifyGpuSwitched();
 }
 
 }  // namespace content