Lazy-creates BluetoothAdapter in ExtensionBluetoothEventRouter (EBEE).

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index c63cd46b43ece18d4622188aa771c8818e8db51e..8b4160690f8371228088336ee3a218ab302797cb 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -366,6 +366,7 @@
         '../sync/sync.gyp:test_support_syncapi_service',
         'test_support_unit',
         # 3) anything tests directly depend on
+        '../device/device.gyp:device_bluetooth_mocks',
         '../google_apis/google_apis.gyp:google_apis',
         '../skia/skia.gyp:skia',
         '../third_party/bzip2/bzip2.gyp:bzip2',
@@ -675,6 +676,7 @@
         'browser/extensions/app_notification_test_util.cc',
         'browser/extensions/app_notify_channel_setup_unittest.cc',
         'browser/extensions/app_sync_data_unittest.cc',
+        'browser/extensions/bluetooth_event_router_unittest.cc',
         'browser/extensions/component_loader_unittest.cc',
         'browser/extensions/convert_user_script_unittest.cc',
         'browser/extensions/convert_web_app_unittest.cc',
@@ -1639,6 +1641,7 @@
           'sources/': [
             ['exclude', '^browser/extensions/api/'],
             ['exclude', '^browser/sync/glue/chrome_extensions_activity_monitor_unittest.cc'],
+            ['exclude', '^browser/extensions/bluetooth_event_router_unittest.cc'],
           ],
         }],
         ['use_ash==1', {