Reland of Implement basic USB device enumeration on Android.

device/usb/usb_endpoint_android.cc

+// 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.
+
+#include "device/usb/usb_endpoint_android.h"
+
+#include "jni/ChromeUsbEndpoint_jni.h"
+
+namespace device {
+
+// static
+bool UsbEndpointAndroid::RegisterJNI(JNIEnv* env) {
+  return RegisterNativesImpl(env);  // Generated in ChromeUsbEndpoint_jni.h
+}
+
+// static
+UsbEndpointDescriptor UsbEndpointAndroid::Convert(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& usb_endpoint) {
+  base::android::ScopedJavaLocalRef<jobject> wrapper =
+      Java_ChromeUsbEndpoint_create(env, usb_endpoint.obj());
+
+  UsbEndpointDescriptor endpoint;
+  endpoint.address = Java_ChromeUsbEndpoint_getAddress(env, wrapper.obj());
+  endpoint.direction = static_cast<UsbEndpointDirection>(
+      Java_ChromeUsbEndpoint_getDirection(env, wrapper.obj()));
+  endpoint.maximum_packet_size =
+      Java_ChromeUsbEndpoint_getMaxPacketSize(env, wrapper.obj());
+  jint attributes = Java_ChromeUsbEndpoint_getAttributes(env, wrapper.obj());
+  endpoint.synchronization_type =
+      static_cast<UsbSynchronizationType>((attributes >> 2) & 3);
+  endpoint.usage_type = static_cast<UsbUsageType>((attributes >> 4) & 3);
+  endpoint.transfer_type = static_cast<UsbTransferType>(
+      Java_ChromeUsbEndpoint_getType(env, wrapper.obj()));
+  endpoint.polling_interval =
+      Java_ChromeUsbEndpoint_getInterval(env, wrapper.obj());
+
+  return endpoint;
+}
+
+}  // namespace device