Mojo: Add/use |typedef std::vector<scoped_refptr<Dispatcher> > DispatcherVector.

mojo/system/remote_message_pipe_unittest.cc

 // Copyright 2014 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 <stdint.h>
 #include <string.h>
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 465 matching lines @@
     dispatcher = NULL;
   }
 
   // Wait.
   EXPECT_EQ(123, waiter.Wait(MOJO_DEADLINE_INDEFINITE));
   mp1->RemoveWaiter(1, &waiter);
 
   // Read from MP 1, port 1.
   char read_buffer[100] = { 0 };
   uint32_t read_buffer_size = static_cast<uint32_t>(sizeof(read_buffer));
-  std::vector<scoped_refptr<Dispatcher> > read_dispatchers;
+  DispatcherVector read_dispatchers;
   uint32_t read_num_dispatchers = 10;  // Maximum to get.
   EXPECT_EQ(MOJO_RESULT_OK,
             mp1->ReadMessage(1, read_buffer, &read_buffer_size,
                              &read_dispatchers, &read_num_dispatchers,
                              MOJO_READ_MESSAGE_FLAG_NONE));
   EXPECT_EQ(sizeof(hello), static_cast<size_t>(read_buffer_size));
   EXPECT_STREQ(hello, read_buffer);
   EXPECT_EQ(1u, read_dispatchers.size());
   EXPECT_EQ(1u, read_num_dispatchers);
   ASSERT_TRUE(read_dispatchers[0].get());
@@ skipping 97 matching lines @@
 
     mp1->Close(1);
 
     RestoreInitialState();
   }
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo