Mojo: Split up Channel::RemoveMessagePipeEndpoint().

mojo/system/channel.h

 // Copyright 2013 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 MOJO_SYSTEM_CHANNEL_H_
 #define MOJO_SYSTEM_CHANNEL_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 125 matching lines @@
   virtual void OnError(Error error) override;
 
   // Helpers for |OnReadMessage| (only called on the creation thread):
   void OnReadMessageForDownstream(
       const MessageInTransit::View& message_view,
       embedder::ScopedPlatformHandleVectorPtr platform_handles);
   void OnReadMessageForChannel(
       const MessageInTransit::View& message_view,
       embedder::ScopedPlatformHandleVectorPtr platform_handles);
 
-  // Removes the message pipe endpoint with the given local ID, which must exist
-  // and be a zombie, and given remote ID. Returns false on failure, in
-  // particular if no message pipe with |local_id| is attached. Only called on
-  // the creation thread.
-  bool RemoveMessagePipeEndpoint(MessageInTransit::EndpointId local_id,
-                                 MessageInTransit::EndpointId remote_id);
+  // Handles "remove message pipe endpoint" messages.
+  bool OnRemoveMessagePipeEndpoint(MessageInTransit::EndpointId local_id,
+                                   MessageInTransit::EndpointId remote_id);
+  // Handles "remove message pipe endpoint ack" messages.
+  bool OnRemoveMessagePipeEndpointAck(MessageInTransit::EndpointId local_id);
 
   // Handles errors (e.g., invalid messages) from the remote side. Callable from
   // any thread.
   void HandleRemoteError(const base::StringPiece& error_message);
   // Handles internal errors/failures from the local side. Callable from any
   // thread.
   void HandleLocalError(const base::StringPiece& error_message);
 
   // Helper to send channel control messages. Returns true on success. Should be
   // called *without* |lock_| held. Callable from any thread.
@@ skipping 23 matching lines @@
   // be checked for existence before use.
   MessageInTransit::EndpointId next_local_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Channel);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_CHANNEL_H_