[PoC] Reformat all BUILD.gn and *.gni files with new gn.

ui/message_center/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")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("message_center") {
   deps = [
@@ skipping 97 matching lines @@
         "views/padded_button.cc",
         "views/padded_button.h",
         "views/popup_alignment_delegate.cc",
         "views/popup_alignment_delegate.h",
         "views/proportional_image_view.cc",
         "views/proportional_image_view.h",
         "views/toast_contents_view.cc",
         "views/toast_contents_view.h",
       ]
       deps += [
+        "//ui/compositor",
         "//ui/events",
         "//ui/views",
-        "//ui/compositor",
       ]
     }
 
     if (use_ash) {
       sources += [
         "views/message_bubble_base.cc",
         "views/message_bubble_base.h",
         "views/message_center_bubble.cc",
         "views/message_center_bubble.h",
       ]
@@ skipping 94 matching lines @@
       deps += [
         # Compositor is needed by message_center_view_unittest.cc and for the
         # fonts used by bounded_label_unittest.cc.
         "//ui/compositor",
         "//ui/views",
         "//ui/views:test_support",
       ]
     }
   }  # enable_notifications && !is_android
 }