Implement basic USB device enumeration on Android.

device/usb/android/java/src/org/chromium/device/usb/ChromeUsbDevice.java

Index: device/usb/android/java/src/org/chromium/device/usb/ChromeUsbDevice.java
diff --git a/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbDevice.java b/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbDevice.java
new file mode 100644
index 0000000000000000000000000000000000000000..92e4e1481cf4340241fe441012a429b2bc49af5e
--- /dev/null
+++ b/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbDevice.java
@@ -0,0 +1,84 @@
+// 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.
+
+package org.chromium.device.usb;
+
+import android.annotation.TargetApi;
+import android.hardware.usb.UsbConfiguration;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbInterface;
+import android.os.Build;
+
+import org.chromium.base.Log;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+/**
+ * Exposes android.hardware.usb.UsbDevice as necessary for C++
+ * device::UsbDeviceAndroid.
+ *
+ * Lifetime is controlled by device::UsbDeviceAndroid.
+ */
+@JNINamespace("device")
+final class ChromeUsbDevice {
+    private static final String TAG = "Usb";
+
+    final UsbDevice mDevice;
+
+    private ChromeUsbDevice(UsbDevice device) {
+        mDevice = device;
+        Log.v(TAG, "ChromeUsbDevice created.");
+    }
+
+    @CalledByNative
+    private static ChromeUsbDevice create(UsbDevice device) {
+        return new ChromeUsbDevice(device);
+    }
+
+    @CalledByNative
+    private int getVendorId() {
+        return mDevice.getVendorId();
+    }
+
+    @CalledByNative
+    private int getProductId() {
+        return mDevice.getProductId();
+    }
+
+    @CalledByNative
+    private String getManufacturerName() {
+        return mDevice.getManufacturerName();
+    }
+
+    @CalledByNative
+    private String getProductName() {
+        return mDevice.getProductName();
+    }
+
+    @CalledByNative
+    private String getSerialNumber() {
+        return mDevice.getSerialNumber();
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @CalledByNative
+    private UsbConfiguration[] getConfigurations() {
+        int count = mDevice.getConfigurationCount();
+        UsbConfiguration[] configurations = new UsbConfiguration[count];
+        for (int i = 0; i < count; ++i) {
+            configurations[i] = mDevice.getConfiguration(i);
+        }
+        return configurations;
+    }
+
+    @CalledByNative
+    private UsbInterface[] getInterfaces() {
+        int count = mDevice.getInterfaceCount();
+        UsbInterface[] interfaces = new UsbInterface[count];
+        for (int i = 0; i < count; ++i) {
+            interfaces[i] = mDevice.getInterface(i);
+        }
+        return interfaces;
+    }
+}