EDK: Move DispatcherTransport to handle_transport.*.

mojo/edk/system/message_pipe.cc

Index: mojo/edk/system/message_pipe.cc
diff --git a/mojo/edk/system/message_pipe.cc b/mojo/edk/system/message_pipe.cc
index cb8fc23b265daae475ac4b1d82e65965da15c565..4303f3f6c304ded504d02c75cd9d2c587d66cb09 100644
--- a/mojo/edk/system/message_pipe.cc
+++ b/mojo/edk/system/message_pipe.cc
@@ -11,6 +11,7 @@
 #include "mojo/edk/system/channel.h"
 #include "mojo/edk/system/channel_endpoint.h"
 #include "mojo/edk/system/channel_endpoint_id.h"
+#include "mojo/edk/system/handle_transport.h"
 #include "mojo/edk/system/incoming_endpoint.h"
 #include "mojo/edk/system/local_message_pipe_endpoint.h"
 #include "mojo/edk/system/message_in_transit.h"
@@ -317,8 +318,7 @@ void MessagePipe::OnDetachFromChannel(unsigned port) {
   Close(port);
 }
 
-MessagePipe::MessagePipe() {
-}
+MessagePipe::MessagePipe() {}
 
 MessagePipe::~MessagePipe() {
   // Owned by the dispatchers. The owning dispatchers should only release us via