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

mojo/edk/system/message_pipe_dispatcher.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/message_pipe_dispatcher.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "mojo/edk/system/configuration.h"
@@ skipping 185 matching lines @@
 
 HandleSignalsState MessagePipeDispatcher::GetHandleSignalsStateImplNoLock()
     const {
   mutex().AssertHeld();
   return message_pipe_->GetHandleSignalsState(port_);
 }
 
 MojoResult MessagePipeDispatcher::AddAwakableImplNoLock(
     Awakable* awakable,
     MojoHandleSignals signals,
-    uint32_t context,
+    uint64_t context,
     HandleSignalsState* signals_state) {
   mutex().AssertHeld();
   return message_pipe_->AddAwakable(port_, awakable, signals, context,
                                     signals_state);
 }
 
 void MessagePipeDispatcher::RemoveAwakableImplNoLock(
     Awakable* awakable,
     HandleSignalsState* signals_state) {
   mutex().AssertHeld();
@@ skipping 18 matching lines @@
 
   bool rv = message_pipe_->EndSerialize(port_, channel, destination,
                                         actual_size, platform_handles);
   message_pipe_ = nullptr;
   port_ = kInvalidPort;
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo