ipc: Remove unnecessary attachment broker plumbing.

ipc/mojo/ipc_mojo_bootstrap.h

 // Copyright 2014 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 IPC_MOJO_IPC_MOJO_BOOTSTRAP_H_
 #define IPC_MOJO_IPC_MOJO_BOOTSTRAP_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process_handle.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_listener.h"
 #include "third_party/mojo/src/mojo/edk/embedder/scoped_platform_handle.h"
 
 namespace IPC {
 
-class AttachmentBroker;
-
 // MojoBootstrap establishes a bootstrap pipe between two processes in
 // Chrome. It creates a native IPC::Channel first, then sends one
 // side of a newly created pipe to peer process. The pipe is intended
 // to be wrapped by Mojo MessagePipe.
 //
 // Clients should implement MojoBootstrapDelegate to get the pipe
 // from MojoBootstrap object.
 //
 // This lives on IO thread other than Create(), which can be called from
 // UI thread as Channel::Create() can be.
 class IPC_MOJO_EXPORT MojoBootstrap : public Listener {
  public:
   class Delegate {
    public:
     virtual void OnPipeAvailable(
         mojo::embedder::ScopedPlatformHandle handle) = 0;
     virtual void OnBootstrapError() = 0;
   };
 
   // Create the MojoBootstrap instance.
   // Instead of creating IPC::Channel, passs its ChannelHandle as |handle|,
   // mode as |mode|. The result is notified to passed |delegate|.
   static scoped_ptr<MojoBootstrap> Create(ChannelHandle handle,
                                           Channel::Mode mode,
-                                          Delegate* delegate,
-                                          AttachmentBroker* broker);
+                                          Delegate* delegate);
 
   MojoBootstrap();
   ~MojoBootstrap() override;
 
   // Start the handshake over the underlying platform channel.
   bool Connect();
 
   // GetSelfPID returns the PID associated with |channel_|.
   base::ProcessId GetSelfPID() const;
 
@@ skipping 26 matching lines @@
   scoped_ptr<Channel> channel_;
   Delegate* delegate_;
   State state_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoBootstrap);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_MOJO_IPC_MOJO_BOOTSTRAP_H_