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

content/common/gpu/gpu_channel.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 CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 
 #include <string>
 
 #include "base/containers/hash_tables.h"
@@ skipping 27 matching lines @@
 class PreemptionFlag;
 class SyncPointManager;
 union ValueState;
 class ValueStateMap;
 namespace gles2 {
 class SubscriptionRefSet;
 }
 }
 
 namespace IPC {
-class AttachmentBroker;
 class MessageFilter;
 }
 
 namespace content {
 class GpuChannelManager;
 class GpuChannelMessageFilter;
 class GpuChannelMessageQueue;
 class GpuJpegDecodeAccelerator;
 class GpuWatchdog;
 
@@ skipping 13 matching lines @@
              base::SingleThreadTaskRunner* io_task_runner,
              int client_id,
              uint64_t client_tracing_id,
              bool software,
              bool allow_future_sync_points,
              bool allow_real_time_streams);
   ~GpuChannel() override;
 
   // Initializes the IPC channel. Caller takes ownership of the client FD in
   // the returned handle and is responsible for closing it.
-  virtual IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event,
-                                  IPC::AttachmentBroker* attachment_broker);
+  virtual IPC::ChannelHandle Init(base::WaitableEvent* shutdown_event);
 
   // Get the GpuChannelManager that owns this channel.
   GpuChannelManager* gpu_channel_manager() const {
     return gpu_channel_manager_;
   }
 
   const std::string& channel_id() const { return channel_id_; }
 
   virtual base::ProcessId GetClientPID() const;
 
@@ skipping 299 matching lines @@
   // True if this channel can create future sync points.
   bool future_sync_points_;
 
   // This number is only ever incremented/read on the IO thread.
   static uint32_t global_order_counter_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_