Mojo: Allow dispatchers to attach PlatformHandles to the MessageInTransit on serialization.

mojo/system/message_pipe_dispatcher.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_MESSAGE_PIPE_DISPATCHER_H_
 #define MOJO_SYSTEM_MESSAGE_PIPE_DISPATCHER_H_
 
 #include <utility>
 
 #include "base/basictypes.h"
@@ skipping 58 matching lines @@
   virtual MojoResult ReadMessageImplNoLock(
       void* bytes,
       uint32_t* num_bytes,
       std::vector<scoped_refptr<Dispatcher> >* dispatchers,
       uint32_t* num_dispatchers,
       MojoReadMessageFlags flags) OVERRIDE;
   virtual MojoResult AddWaiterImplNoLock(Waiter* waiter,
                                          MojoWaitFlags flags,
                                          MojoResult wake_result) OVERRIDE;
   virtual void RemoveWaiterImplNoLock(Waiter* waiter) OVERRIDE;
-  virtual size_t GetMaximumSerializedSizeImplNoLock(
-      const Channel* channel) const OVERRIDE;
-  virtual bool SerializeAndCloseImplNoLock(Channel* channel,
-                                           void* destination,
-                                           size_t* actual_size) OVERRIDE;
+  virtual void StartSerializeImplNoLock(Channel* channel,
+                                        size_t* max_size,
+                                        size_t* max_platform_handles) OVERRIDE;
+  virtual bool EndSerializeAndCloseImplNoLock(
+      Channel* channel,
+      void* destination,
+      size_t* actual_size,
+      std::vector<embedder::PlatformHandle>* platform_handles) OVERRIDE;
 
   // Protected by |lock()|:
   scoped_refptr<MessagePipe> message_pipe_;  // This will be null if closed.
   unsigned port_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePipeDispatcher);
 };
 
 class MessagePipeDispatcherTransport : public DispatcherTransport {
  public:
   explicit MessagePipeDispatcherTransport(DispatcherTransport transport);
 
   MessagePipe* GetMessagePipe() {
     return message_pipe_dispatcher()->GetMessagePipeNoLock();
   }
   unsigned GetPort() { return message_pipe_dispatcher()->GetPortNoLock(); }
 
  private:
   MessagePipeDispatcher* message_pipe_dispatcher() {
     return static_cast<MessagePipeDispatcher*>(dispatcher());
   }
 
   // Copy and assign allowed.
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_MESSAGE_PIPE_DISPATCHER_H_