Use standardized and extendable accelerometer update type.

ash/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")
 
 gypi_values = exec_script(
     "//build/gypi_to_gn.py",
     [ rebase_path("ash.gyp") ],
@@ skipping 11 matching lines @@
     "//base",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//components/user_manager",
     "//content/public/browser",
     "//media",
     "//net",
     "//skia",
     "//third_party/icu",
+    "//ui/accelerometer",
     "//ui/accessibility",
     "//ui/app_list",
     "//ui/aura",
     "//ui/base",
     "//ui/compositor",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/keyboard",
@@ skipping 202 matching lines @@
     "//ash/strings",
     "//base",
     "//base/allocator",
     "//base/test:test_support",
     "//components/user_manager",
     "//content/public/browser",
     "//content/test:test_support",
     "//skia",
     "//testing/gtest",
     "//third_party/icu",
+    "//ui/accelerometer",
     "//ui/accessibility",
     "//ui/aura",
     "//ui/aura:test_support",
     "//ui/base",
     "//ui/base:test_support",
     "//ui/compositor",
     "//ui/compositor:test_support",
     "//ui/events",
     "//ui/events:test_support",
     "//ui/events:gesture_detection",
@@ skipping 110 matching lines @@
     "//testing/gtest",
     "//ui/aaccessibility",
   ]
 
   if (is_chromeos) {
     deps += [ "//ui/display" ]
   }
 }
 
 }  # if false