Privatize StrongBinding lifetime management

device/usb/mojo/device_impl.h

Index: device/usb/mojo/device_impl.h
diff --git a/device/usb/mojo/device_impl.h b/device/usb/mojo/device_impl.h
index 8ec722a478b916fde68a75f75358deedd2c305bc..493a98c306f247ddf4333c9ee6c98daf0291432a 100644
--- a/device/usb/mojo/device_impl.h
+++ b/device/usb/mojo/device_impl.h
@@ -17,8 +17,8 @@
 #include "device/usb/public/interfaces/device.mojom.h"
 #include "device/usb/usb_device.h"
 #include "device/usb/usb_device_handle.h"
+#include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace net {
 class IOBuffer;
@@ -37,7 +37,7 @@ class DeviceImpl : public Device, public device::UsbDevice::Observer {
   DeviceImpl(scoped_refptr<UsbDevice> device,
              DeviceInfoPtr device_info,
              base::WeakPtr<PermissionProvider> permission_provider,
-             mojo::InterfaceRequest<Device> request);
+             DeviceRequest request);
   ~DeviceImpl() override;
 
  private:
@@ -110,7 +110,7 @@ class DeviceImpl : public Device, public device::UsbDevice::Observer {
   // has been closed.
   scoped_refptr<UsbDeviceHandle> device_handle_;
 
-  mojo::StrongBinding<Device> binding_;
+  mojo::Binding<Device> binding_;
   base::WeakPtrFactory<DeviceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceImpl);