Mojo: Add static factory functions to MessagePipe.

mojo/system/core.cc

 // 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.
 
 #include "mojo/system/core.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/time/time.h"
@@ skipping 190 matching lines @@
     handle_pair = handle_table_.AddDispatcherPair(dispatcher0, dispatcher1);
   }
   if (handle_pair.first == MOJO_HANDLE_INVALID) {
     DCHECK_EQ(handle_pair.second, MOJO_HANDLE_INVALID);
     LOG(ERROR) << "Handle table full";
     dispatcher0->Close();
     dispatcher1->Close();
     return MOJO_RESULT_RESOURCE_EXHAUSTED;
   }
 
-  scoped_refptr<MessagePipe> message_pipe(new MessagePipe());
+  scoped_refptr<MessagePipe> message_pipe(MessagePipe::CreateLocalLocal());
   dispatcher0->Init(message_pipe, 0);
   dispatcher1->Init(message_pipe, 1);
 
   message_pipe_handle0.Put(handle_pair.first);
   message_pipe_handle1.Put(handle_pair.second);
   return MOJO_RESULT_OK;
 }
 
 // Implementation note: To properly cancel waiters and avoid other races, this
 // does not transfer dispatchers from one handle to another, even when sending a
@@ skipping 375 matching lines @@
   if (signals_states) {
     for (; i < num_handles; i++)
       signals_states[i] = dispatchers[i]->GetHandleSignalsState();
   }
 
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo