Implement basic USB device enumeration on Android.

device/usb/usb_device_android.h

+// 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_USB_DEVICE_ANDROID_H_
+#define DEVICE_USB_USB_DEVICE_ANDROID_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "device/usb/usb_device.h"
+
+namespace device {
+
+class UsbDeviceAndroid : public UsbDevice {
+ public:
+  // Register C++ methods exposed to Java using JNI.
+  static bool RegisterJNI(JNIEnv* env);
+
+  static scoped_refptr<UsbDeviceAndroid> Create(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& usb_device);
+
+  // UsbDevice:
+  void Open(const OpenCallback& callback) override;
+  const UsbConfigDescriptor* GetActiveConfiguration() override;
+
+ private:
+  UsbDeviceAndroid(JNIEnv* env,
+                   uint16_t vendor_id,
+                   uint16_t product_id,
+                   const base::string16& manufacturer_string,
+                   const base::string16& product_string,
+                   const base::string16& serial_number,
+                   const base::android::JavaRef<jobject>& wrapper);
+  ~UsbDeviceAndroid() override;
+
+  // Java object org.chromium.device.usb.ChromeUsbDevice.
+  base::android::ScopedJavaGlobalRef<jobject> j_object_;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_USB_USB_DEVICE_ANDROID_H_