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

content/child/child_thread_impl.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_CHILD_CHILD_THREAD_IMPL_H_
 #define CONTENT_CHILD_CHILD_THREAD_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 69 matching lines @@
   virtual void Shutdown();
 
   // IPC::Sender implementation:
   bool Send(IPC::Message* msg) override;
 
   // ChildThread implementation:
 #if defined(OS_WIN)
   void PreCacheFont(const LOGFONT& log_font) override;
   void ReleaseCachedFonts() override;
 #endif
-  IPC::AttachmentBroker* GetAttachmentBroker() override;
 
   IPC::SyncChannel* channel() { return channel_.get(); }
 
   MessageRouter* GetRouter();
 
   // Allocates a block of shared memory of the given size. Returns NULL on
   // failure.
   // Note: On posix, this requires a sync IPC to the browser process,
   // but on windows the child process directly allocates the block.
   scoped_ptr<base::SharedMemory> AllocateSharedMemory(size_t buf_size);
@@ skipping 226 matching lines @@
 
  private:
   struct Options options_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_CHILD_THREAD_IMPL_H_