Replace Chrome IPC with Mojo IPC for querying BatteryStatus service

mojo/common/handle_watcher.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/common/handle_watcher.h"
 
 #include <map>
 
 #include "base/atomic_sequence_num.h"
 #include "base/bind.h"
@@ skipping 105 matching lines @@
 }
 
 void WatcherBackend::RemoveAndNotify(const Handle& handle,
                                      MojoResult result) {
   if (handle_to_data_.count(handle) == 0)
     return;
 
   const WatchData data(handle_to_data_[handle]);
   handle_to_data_.erase(handle);
   MessagePumpMojo::current()->RemoveHandler(handle);
+
   data.message_loop->PostTask(FROM_HERE, base::Bind(data.callback, result));
 }
 
 bool WatcherBackend::GetMojoHandleByWatcherID(WatcherID watcher_id,
                                               Handle* handle) const {
   for (HandleToWatchDataMap::const_iterator i = handle_to_data_.begin();
        i != handle_to_data_.end(); ++i) {
     if (i->second.id == watcher_id) {
       *handle = i->second.handle;
       return true;
@@ skipping 330 matching lines @@
         this, handle, handle_signals, deadline, callback));
   }
 }
 
 void HandleWatcher::Stop() {
   state_.reset();
 }
 
 }  // namespace common
 }  // namespace mojo