Implement basic USB device enumeration on Android.

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

Index: device/usb/android/java/src/org/chromium/device/usb/ChromeUsbConfiguration.java
diff --git a/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbConfiguration.java b/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbConfiguration.java
new file mode 100644
index 0000000000000000000000000000000000000000..90371e53c0e7c7484135411ef423d7acd309f5d6
--- /dev/null
+++ b/device/usb/android/java/src/org/chromium/device/usb/ChromeUsbConfiguration.java
@@ -0,0 +1,68 @@
+// 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.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.UsbConfiguration as necessary for C++
+ * device::UsbConfigurationAndroid.
+ *
+ * Lifetime is controlled by device::UsbConfigurationAndroid.
+ */
+@JNINamespace("device")
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+final class ChromeUsbConfiguration {
+    private static final String TAG = "Usb";
+
+    final UsbConfiguration mConfiguration;
+
+    private ChromeUsbConfiguration(UsbConfiguration configuration) {
+        mConfiguration = configuration;
+        Log.v(TAG, "ChromeUsbConfiguration created.");
+    }
+
+    @CalledByNative
+    private static ChromeUsbConfiguration create(UsbConfiguration configuration) {
+        return new ChromeUsbConfiguration(configuration);
+    }
+
+    @CalledByNative
+    private int getConfigurationValue() {
+        return mConfiguration.getId();
+    }
+
+    @CalledByNative
+    private boolean isSelfPowered() {
+        return mConfiguration.isSelfPowered();
+    }
+
+    @CalledByNative
+    private boolean isRemoteWakeup() {
+        return mConfiguration.isRemoteWakeup();
+    }
+
+    @CalledByNative
+    private int getMaxPower() {
+        return mConfiguration.getMaxPower();
+    }
+
+    @CalledByNative
+    private UsbInterface[] getInterfaces() {
+        int count = mConfiguration.getInterfaceCount();
+        UsbInterface[] interfaces = new UsbInterface[count];
+        for (int i = 0; i < count; ++i) {
+            interfaces[i] = mConfiguration.getInterface(i);
+        }
+        return interfaces;
+    }
+}