ChannelMojo: Replace hand written messsages with mojo.

ipc/mojo/ipc_channel_mojo.h

Index: ipc/mojo/ipc_channel_mojo.h
diff --git a/ipc/mojo/ipc_channel_mojo.h b/ipc/mojo/ipc_channel_mojo.h
index e5a4e335541c7f46d194290f2b88bb51b4aecc5c..45d248231fceb31aec8479f93936e9578d3e696d 100644
--- a/ipc/mojo/ipc_channel_mojo.h
+++ b/ipc/mojo/ipc_channel_mojo.h
@@ -114,15 +114,12 @@ class IPC_MOJO_EXPORT ChannelMojo : public Channel,
 #endif  // defined(OS_POSIX) && !defined(OS_NACL)
 
   // MojoBootstrapDelegate implementation
-  void OnPipeAvailable(mojo::embedder::ScopedPlatformHandle handle) override;
   void OnBootstrapError() override;
 
   // Called from MessagePipeReader implementations
   void OnMessageReceived(Message& message);
-  void OnConnected(mojo::ScopedMessagePipeHandle pipe);
   void OnPipeClosed(internal::MessagePipeReader* reader);
   void OnPipeError(internal::MessagePipeReader* reader);
-  void set_peer_pid(base::ProcessId pid) { peer_pid_ = pid; }
 
  protected:
   ChannelMojo(Delegate* delegate,
@@ -130,6 +127,13 @@ class IPC_MOJO_EXPORT ChannelMojo : public Channel,
               Mode mode,
               Listener* listener);
 
+  mojo::ScopedMessagePipeHandle CreateMessagingPipe(
+      mojo::embedder::ScopedPlatformHandle handle);
+  void InitMessageReader(mojo::ScopedMessagePipeHandle pipe, int32_t peer_pid);
+
+  Listener* listener() const { return listener_; }
+  void set_peer_pid(base::ProcessId pid) { peer_pid_ = pid; }
+
  private:
   struct ChannelInfoDeleter {
     void operator()(mojo::embedder::ChannelInfo* ptr) const;
@@ -141,7 +145,6 @@ class IPC_MOJO_EXPORT ChannelMojo : public Channel,
   typedef internal::MessagePipeReader::DelayedDeleter ReaderDeleter;
 
   void InitDelegate(ChannelMojo::Delegate* delegate);
-  void InitControlReader(mojo::embedder::ScopedPlatformHandle handle);
 
   scoped_ptr<MojoBootstrap> bootstrap_;
   base::WeakPtr<Delegate> delegate_;
@@ -151,7 +154,6 @@ class IPC_MOJO_EXPORT ChannelMojo : public Channel,
   scoped_ptr<mojo::embedder::ChannelInfo,
              ChannelInfoDeleter> channel_info_;
 
-  scoped_ptr<internal::ControlReader, ReaderDeleter> control_reader_;
   scoped_ptr<internal::MessageReader, ReaderDeleter> message_reader_;
   ScopedVector<Message> pending_messages_;