Match against all configurations in UsbDeviceFilter.

device/usb/mock_usb_device.h

Index: device/usb/mock_usb_device.h
diff --git a/device/usb/mock_usb_device.h b/device/usb/mock_usb_device.h
index 30b5bdd3b7b7e29f0a54d361e99228c11d87d0b0..d4dbbac16d72d8487a2c59effc416edb3ff614ce 100644
--- a/device/usb/mock_usb_device.h
+++ b/device/usb/mock_usb_device.h
@@ -28,6 +28,9 @@ class MockUsbDevice : public UsbDevice {
                 const std::string& product_string,
                 const std::string& serial_number,
                 const GURL& webusb_landing_page);
+  MockUsbDevice(uint16 vendor_id,
+                uint16 product_id,
+                const UsbConfigDescriptor& configuration);
 
   MOCK_METHOD1(Open, void(const OpenCallback&));
   MOCK_METHOD1(Close, bool(scoped_refptr<UsbDeviceHandle>));