Extract //device/usb mocks so that they can be shared.

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
new file mode 100644
index 0000000000000000000000000000000000000000..823aac66efce7a27e70e450eaa217197e251aa70
--- /dev/null
+++ b/device/usb/mock_usb_device.h
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+// Copyright 2015 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_MOCK_USB_DEVICE_H_
+#define DEVICE_USB_MOCK_USB_DEVICE_H_
+
+#include "device/usb/usb_device.h"
+
+#include <string>
+
+#include "device/usb/usb_device_handle.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace device {
+
+class MockUsbDevice : public UsbDevice {
+ public:
+  MockUsbDevice(uint16 vendor_id, uint16 product_id);
+  MockUsbDevice(uint16 vendor_id,
+                uint16 product_id,
+                const std::string& manufacturer_string,
+                const std::string& product_string,
+                const std::string& serial_number);
+
+  MOCK_METHOD1(Open, void(const OpenCallback&));
+  MOCK_METHOD1(Close, bool(scoped_refptr<UsbDeviceHandle>));
+  MOCK_METHOD0(GetConfiguration, const device::UsbConfigDescriptor*());
+
+ private:
+  ~MockUsbDevice() override;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_USB_MOCK_USB_DEVICE_H_