EDK: Change Awakable::Awake()'s context, etc., to be a uint64_t.

mojo/edk/system/local_message_pipe_endpoint.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/edk/system/local_message_pipe_endpoint.h"
 
 #include <string.h>
 
 #include <utility>
 
@@ skipping 133 matching lines @@
   } else {
     rv.satisfied_signals |= MOJO_HANDLE_SIGNAL_PEER_CLOSED;
   }
   rv.satisfiable_signals |= MOJO_HANDLE_SIGNAL_PEER_CLOSED;
   return rv;
 }
 
 MojoResult LocalMessagePipeEndpoint::AddAwakable(
     Awakable* awakable,
     MojoHandleSignals signals,
-    uint32_t context,
+    uint64_t context,
     HandleSignalsState* signals_state) {
   DCHECK(is_open_);
 
   HandleSignalsState state = GetHandleSignalsState();
   if (state.satisfies(signals)) {
     if (signals_state)
       *signals_state = state;
     return MOJO_RESULT_ALREADY_EXISTS;
   }
   if (!state.can_satisfy(signals)) {
@@ skipping 10 matching lines @@
     Awakable* awakable,
     HandleSignalsState* signals_state) {
   DCHECK(is_open_);
   awakable_list_.Remove(awakable);
   if (signals_state)
     *signals_state = GetHandleSignalsState();
 }
 
 }  // namespace system
 }  // namespace mojo