Fix WeakPtrFactory member ordering in device

device/usb/usb_device_handle_impl.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 DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_
 #define DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 131 matching lines @@
   std::set<Transfer*> transfers_;
 
   // A map from endpoints to interfaces
   typedef std::map<int, int> EndpointMap;
   EndpointMap endpoint_map_;
 
   // Retain the UsbContext so that the platform context will not be destroyed
   // before this handle.
   scoped_refptr<UsbContext> context_;
 
-  base::WeakPtrFactory<UsbDeviceHandleImpl> weak_factory_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   base::ThreadChecker thread_checker_;
+  base::WeakPtrFactory<UsbDeviceHandleImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDeviceHandleImpl);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_HANDLE_IMPL_H_