bluetooth: Initial JNI setup for device/bluetooth.

device/bluetooth/android/BUILD.gn

+# 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.
+
+import("//build/config/android/config.gni")
+import("//build/config/android/rules.gni")
+
+assert(is_android)
+
+source_set("android") {
+  sources = [
+    "bluetooth_jni_registrar.cc",
+    "bluetooth_jni_registrar.h",
+  ]
+
+  defines = [ "DEVICE_BLUETOOTH_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+  ]
+}
+
+generate_jni("bluetooth_jni") {
+  sources = [
+    "java/src/org/chromium/device/bluetooth/BluetoothAdapter.java",
+  ]
+  jni_package = "bluetooth"
+}