[MD settings] change dropdown to accept array of objects rather than array of tuples

chrome/browser/resources/settings/appearance_page/compiled_resources.gyp

 # Copyright 2015 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.
 {
   'targets': [
     {
       'target_name': 'appearance_fonts_page',
       'variables': {
         'depends': [
           '../../../../../ui/webui/resources/js/compiled_resources.gyp:load_time_data',
           '../../../../../ui/webui/resources/js/compiled_resources.gyp:cr',
           '../../../../../ui/webui/resources/js/cr.js',
           '../../../../../ui/webui/resources/js/i18n_behavior.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/iron-a11y-keys-behavior/iron-a11y-keys-behavior-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-button-state-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/iron-behaviors/iron-control-state-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/iron-form-element-behavior/iron-form-element-behavior-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/iron-range-behavior/iron-range-behavior-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-inky-focus-behavior-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/paper-behaviors/paper-ripple-behavior-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/paper-ripple/paper-ripple-extracted.js',
           '../../../../../third_party/polymer/v1_0/components-chromium/paper-slider/paper-slider-extracted.js',
+          '../controls/settings_dropdown_menu.js',
+          '../prefs/pref_util.js'
         ],
         'externs': [
           '../../../../../third_party/closure_compiler/externs/settings_private.js'
         ],
       },
       'includes': ['../../../../../third_party/closure_compiler/compile_js.gypi'],
     },
     {
       'target_name': 'appearance_page',
       'variables': {
         'depends': [
           '../../../../../ui/webui/resources/js/compiled_resources.gyp:assert',
           '../../../../../ui/webui/resources/js/compiled_resources.gyp:load_time_data',
           '../../../../../ui/webui/resources/js/cr.js',
           '../../../../../ui/webui/resources/js/i18n_behavior.js',
+          '../controls/settings_dropdown_menu.js',
+          '../prefs/pref_util.js',
           '../settings_page/settings_animated_pages.js'
         ],
         'externs': [
           '../../../../../third_party/closure_compiler/externs/settings_private.js',
           '../../../../../third_party/closure_compiler/externs/chrome_send.js',
         ],
       },
       'includes': ['../../../../../third_party/closure_compiler/compile_js.gypi'],
     },
   ],
 }