Revert of bluetooth: Move requestDevice() to UI thread.

content/browser/bluetooth/bluetooth_dispatcher_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_
 
 #include "base/basictypes.h"
 #include "content/common/bluetooth/bluetooth_error.h"
 #include "content/public/browser/browser_message_filter.h"
@@ skipping 20 matching lines @@
   BluetoothDispatcherHost();
   ~BluetoothDispatcherHost() override;
 
  private:
   // Set |adapter_| to a BluetoothAdapter instance and register observers,
   // releasing references to previous |adapter_|.
   void set_adapter(scoped_refptr<device::BluetoothAdapter> adapter);
 
   // IPC Handlers, see definitions in bluetooth_messages.h.
   void OnRequestDevice(int thread_id, int request_id);
-  void OnRequestDeviceOnUI(int thread_id, int request_id);
   void OnSetBluetoothMockDataSetForTesting(const std::string& name);
 
   // A BluetoothAdapter instance representing an adapter of the system.
   scoped_refptr<device::BluetoothAdapter> adapter_;
 
   enum class MockData { NOT_MOCKING, REJECT, RESOLVE };
   MockData bluetooth_mock_data_set_;
   BluetoothError bluetooth_request_device_reject_type_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BLUETOOTH_BLUETOOTH_DISPATCHER_HOST_H_