Reland: cros: Show notification when low-power charger connected

ui/message_center/message_center.gyp

Index: ui/message_center/message_center.gyp
diff --git a/ui/message_center/message_center.gyp b/ui/message_center/message_center.gyp
index ee469d27e65af253a4de1ecf1fdd43caaa6181ea..ef5a0cc98af4f9736e7478c926e5234dda1d8f4f 100644
--- a/ui/message_center/message_center.gyp
+++ b/ui/message_center/message_center.gyp
@@ -125,6 +125,23 @@
       ],
     },  # target_name: message_center
     {
+      'target_name': 'message_center_test_support',
+      'type': 'static_library',
+      'dependencies': [
+        '../../base/base.gyp:base',
+        '../../base/base.gyp:test_support_base',
+        '../../skia/skia.gyp:skia',
+        '../ui.gyp:ui',
+        'message_center',
+      ],
+      'sources': [
+        'fake_message_center.h',
+        'fake_message_center.cc',
+        'fake_notifier_settings_provider.h',
+        'fake_notifier_settings_provider.cc',
+      ],
+    },  # target_name: message_center_test_support
+    {
       'target_name': 'message_center_unittests',
       'type': 'executable',
       'dependencies': [
@@ -135,6 +152,7 @@
         '../ui.gyp:run_ui_unittests',
         '../ui.gyp:ui',
         'message_center',
+        'message_center_test_support',
       ],
       'sources': [
         'cocoa/notification_controller_unittest.mm',
@@ -146,10 +164,6 @@
         'cocoa/tray_view_controller_unittest.mm',
         'message_center_tray_unittest.cc',
         'message_center_impl_unittest.cc',
-        'fake_message_center.h',
-        'fake_message_center.cc',
-        'fake_notifier_settings_provider.h',
-        'fake_notifier_settings_provider.cc',
         'notification_list_unittest.cc',
         'test/run_all_unittests.cc',
       ],