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

content/common/gpu/gpu_channel_test_common.h

 // Copyright (c) 2015 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 "base/memory/scoped_ptr.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_channel_manager.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
@@ skipping 42 matching lines @@
                  base::SingleThreadTaskRunner* task_runner,
                  base::SingleThreadTaskRunner* io_task_runner,
                  int client_id,
                  uint64_t client_tracing_id,
                  bool allow_future_sync_points,
                  bool allow_real_time_streams);
   ~TestGpuChannel() override;
 
   base::ProcessId GetClientPID() const override;
 
-  IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event,
-                          IPC::AttachmentBroker* attachment_broker) override;
+  IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event) override;
 
   // IPC::Sender implementation.
   bool Send(IPC::Message* msg) override;
 
  private:
   IPC::TestSink* const sink_;
 };
 
 class GpuChannelTestCommon : public testing::Test {
  public:
   GpuChannelTestCommon();
   ~GpuChannelTestCommon() override;
 
  protected:
   IPC::TestSink* sink() { return sink_.get(); }
   GpuChannelManager* channel_manager() { return channel_manager_.get(); }
   base::TestSimpleTaskRunner* task_runner() { return task_runner_.get(); }
 
  private:
   scoped_ptr<IPC::TestSink> sink_;
   scoped_refptr<base::TestSimpleTaskRunner> task_runner_;
   scoped_refptr<base::TestSimpleTaskRunner> io_task_runner_;
   scoped_ptr<gpu::SyncPointManager> sync_point_manager_;
   scoped_ptr<GpuChannelManager> channel_manager_;
 };
 
 }  // namespace content