Mojo: Change the way message pipes are passed over channels.

mojo/edk/system/message_in_transit.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_EDK_SYSTEM_MESSAGE_IN_TRANSIT_H_
 #define MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 41 matching lines @@
   static const Type kTypeChannel = 2;
   // Messages that are consumed by the |RawChannel| (implementation).
   static const Type kTypeRawChannel = 3;
 
   typedef uint16_t Subtype;
   // Subtypes for type |kTypeMessagePipeEndpoint|:
   static const Subtype kSubtypeMessagePipeEndpointData = 0;
   // Subtypes for type |kTypeMessagePipe|:
   // Nothing currently.
   // Subtypes for type |kTypeChannel|:
-  static const Subtype kSubtypeChannelRunMessagePipeEndpoint = 0;
+  static const Subtype kSubtypeChannelAttachAndRunEndpoint = 0;
   static const Subtype kSubtypeChannelRemoveMessagePipeEndpoint = 1;
   static const Subtype kSubtypeChannelRemoveMessagePipeEndpointAck = 2;
+
   // Subtypes for type |kTypeRawChannel|:
   static const Subtype kSubtypeRawChannelPosixExtraPlatformHandles = 0;
 
   // Messages (the header and data) must always be aligned to a multiple of this
   // quantity (which must be a power of 2).
   static const size_t kMessageAlignment = 8;
 
   // Forward-declare |Header| so that |View| can use it:
  private:
   struct Header;
@@ skipping 184 matching lines @@
   // some reason.)
   scoped_ptr<DispatcherVector> dispatchers_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageInTransit);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_MESSAGE_IN_TRANSIT_H_