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

mojo/system/message_pipe_endpoint.cc

Index: mojo/system/message_pipe_endpoint.cc
diff --git a/mojo/system/message_pipe_endpoint.cc b/mojo/system/message_pipe_endpoint.cc
index a1a7be3a41502b0fef2247a88bed21d14930f593..128313e7e85e752497ee33d3aa2aeb43401f87ad 100644
--- a/mojo/system/message_pipe_endpoint.cc
+++ b/mojo/system/message_pipe_endpoint.cc
@@ -18,11 +18,11 @@ void MessagePipeEndpoint::CancelAllWaiters() {
   NOTREACHED();
 }
 
-MojoResult MessagePipeEndpoint::ReadMessage(
-    void* /*bytes*/, uint32_t* /*num_bytes*/,
-    std::vector<scoped_refptr<Dispatcher> >* /*dispatchers*/,
-    uint32_t* /*num_dispatchers*/,
-    MojoReadMessageFlags /*flags*/) {
+MojoResult MessagePipeEndpoint::ReadMessage(void* /*bytes*/,
+                                            uint32_t* /*num_bytes*/,
+                                            DispatcherVector* /*dispatchers*/,
+                                            uint32_t* /*num_dispatchers*/,
+                                            MojoReadMessageFlags /*flags*/) {
   NOTREACHED();
   return MOJO_RESULT_INTERNAL;
 }