bluetooth: Add Device connection logic and accompanying user interface.

device/bluetooth/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/features.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
 
 config("bluetooth_config") {
@@ skipping 10 matching lines @@
 }
 
 source_set("mojo") {
   sources = [
     "adapter.cc",
     "adapter.h",
     "adapter_factory.cc",
     "adapter_factory.h",
     "device.cc",
     "device.h",
+    "test/device_connection_helper.cc",
+    "test/device_connection_helper.h",
   ]
 
   public_deps = [
     ":bluetooth",
     "//device/bluetooth/public/interfaces:experimental_interfaces",
   ]
 }
 
 component("bluetooth") {
   sources = [
@@ skipping 363 matching lines @@
   }
 
   android_library("java") {
     java_files = java_sources_needing_jni
     deps = [
       "//base:base_java",
       "//components/location/android:location_java",
     ]
   }
 }