Mojo Channel: Fix deferred proxy dispatch; support paused channels

ipc/ipc_message_pipe_reader.h

Index: ipc/ipc_message_pipe_reader.h
diff --git a/ipc/ipc_message_pipe_reader.h b/ipc/ipc_message_pipe_reader.h
index c00cab4bfee6b58383cd4446bccfcbf92ae63841..9962daf3a0f44f1c77735ff93a978aff88f92bdf 100644
--- a/ipc/ipc_message_pipe_reader.h
+++ b/ipc/ipc_message_pipe_reader.h
@@ -88,6 +88,8 @@ class IPC_EXPORT MessagePipeReader : public NON_EXPORTED_BASE(mojom::Channel) {
 
   base::ProcessId GetPeerPid() const { return peer_pid_; }
 
+  mojom::Channel* sender() const { return sender_.get(); }
+
  protected:
   void OnPipeClosed();
   void OnPipeError(MojoResult error);
@@ -110,7 +112,6 @@ class IPC_EXPORT MessagePipeReader : public NON_EXPORTED_BASE(mojom::Channel) {
 
   // Raw message pipe handle and interface ID we use to send legacy IPC messages

[yzshen1, 2016/09/02 22:03:36]

nit: please update the comment accordingly.

[Ken Rockot(use gerrit already), 2016/09/06 17:21:27]

Done

   // over the associated pipe.
-  const uint32_t sender_interface_id_;
   const mojo::MessagePipeHandle sender_pipe_;
 
   base::ThreadChecker thread_checker_;