EDK: Make mojo::embedder::AsyncWait (etc.) take an std::function instead of a base::Callback.

mojo/edk/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/edk/system/core.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 94 matching lines @@
                                         RefPtr<Dispatcher>* dispatcher) {
   if (handle == MOJO_HANDLE_INVALID)
     return MOJO_RESULT_INVALID_ARGUMENT;
 
   MutexLocker locker(&handle_table_mutex_);
   return handle_table_.GetAndRemoveDispatcher(handle, dispatcher);
 }
 
 MojoResult Core::AsyncWait(MojoHandle handle,
                            MojoHandleSignals signals,
-                           const base::Callback<void(MojoResult)>& callback) {
+                           const std::function<void(MojoResult)>& callback) {
   RefPtr<Dispatcher> dispatcher(GetDispatcher(handle));
   DCHECK(dispatcher);
 
   std::unique_ptr<AsyncWaiter> waiter(new AsyncWaiter(callback));
   MojoResult rv = dispatcher->AddAwakable(waiter.get(), signals, 0, nullptr);
   if (rv == MOJO_RESULT_OK)
     ignore_result(waiter.release());
   return rv;
 }
 
@@ skipping 476 matching lines @@
   if (signals_states) {
     for (; i < num_handles; i++)
       signals_states[i] = dispatchers[i]->GetHandleSignalsState();
   }
 
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo