bluetooth: Use BluetoothAdapter in BluetoothDispatcherHost.

content/child/bluetooth/bluetooth_dispatcher.cc

 // Copyright 2014 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 "content/child/bluetooth/bluetooth_dispatcher.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 87 matching lines @@
 }
 
 void BluetoothDispatcher::OnWorkerRunLoopStopped() {
   delete this;
 }
 
 void BluetoothDispatcher::OnRequestDeviceSuccess(
     int thread_id,
     int request_id,
     const std::string& device_instance_id) {
+  DCHECK(pending_requests_.Lookup(request_id)) << request_id;
   pending_requests_.Lookup(request_id)
       ->onSuccess(
           new WebBluetoothDevice(WebString::fromUTF8(device_instance_id)));
   pending_requests_.Remove(request_id);
 }
 
 void BluetoothDispatcher::OnRequestDeviceError(int thread_id,
                                                int request_id,
                                                BluetoothError error_type) {
+  DCHECK(pending_requests_.Lookup(request_id)) << request_id;
   pending_requests_.Lookup(request_id)
       ->onError(new WebBluetoothError(
           WebBluetoothErrorFromBluetoothError(error_type), ""));
   pending_requests_.Remove(request_id);
 }
 
 }  // namespace content