Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/extensions/api/usb/usb_api.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/usb/usb_api.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "chrome/browser/extensions/api/usb/usb_device_resource.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/usb/usb_device_handle.h"
 #include "chrome/browser/usb/usb_service.h"
 #include "chrome/common/extensions/api/usb.h"
 #include "chrome/common/extensions/permissions/usb_device_permission.h"
+#include "extensions/browser/extension_system.h"
 #include "extensions/common/permissions/permissions_data.h"
 
 namespace usb = extensions::api::usb;
 namespace BulkTransfer = usb::BulkTransfer;
 namespace ClaimInterface = usb::ClaimInterface;
 namespace CloseDevice = usb::CloseDevice;
 namespace ControlTransfer = usb::ControlTransfer;
 namespace FindDevices = usb::FindDevices;
 namespace GetDevices = usb::GetDevices;
 namespace InterruptTransfer = usb::InterruptTransfer;
@@ skipping 1142 matching lines @@
     SetResult(new base::FundamentalValue(false));
     CompleteWithError(kErrorResetDevice);
     return;
   }
 
   SetResult(new base::FundamentalValue(true));
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions