Implement basic USB device enumeration on Android.

content/public/android/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
 content_jni_gypi_values = exec_script("//build/gypi_to_gn.py",
                                       [ rebase_path("../../content_jni.gypi") ],
                                       "scope",
@@ skipping 17 matching lines @@
   resource_dirs = [ "java/res" ]
 }
 
 android_library("content_java") {
   deps = [
     ":content_java_resources",
     "//base:base_java",
     "//device/battery:mojo_bindings_java",
     "//device/battery/android:battery_monitor_android",
     "//device/bluetooth:java",
+    "//device/usb:java",
     "//device/vibration:mojo_bindings_java",
     "//device/vibration/android:vibration_manager_android",
     "//media/base/android:media_java",
     "//media/midi:midi_java",
     "//mojo/android:system_java",
     "//mojo/public/java:bindings",
     "//mojo/public/java:system",
     "//net/android:net_java",
     "//third_party/WebKit/public:blink_headers_java",
     "//third_party/android_tools:android_support_v13_java",
@@ skipping 144 matching lines @@
 
 # GYP: //content/content_tests.gypi:content_junit_tests
 junit_binary("content_junit_tests") {
   java_files = [ "junit/src/org/chromium/content/browser/input/GamepadMappingsTest.java" ]
   deps = [
     ":content_java",
     "//base:base_java",
     "//base:base_java_test_support",
   ]
 }