Cleanup: Extract icon related methods outside of util.js

chrome/browser/resources/history/compiled_resources2.gyp

 # Copyright 2016 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': 'externs',
       'includes': ['../../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'history_focus_manager',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:focus_manager',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'history',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:action_link',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:cr',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:event_tracker',
+        '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:icon',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         '<(DEPTH)/ui/webui/resources/js/cr/compiled_resources2.gyp:ui',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:alert_overlay',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:command',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:focus_grid',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:focus_outline_manager',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:focus_row',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:menu',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:menu_button',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:menu_item',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:overlay',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:position_util',
         'history_focus_manager',
         '<(EXTERNS_GYP):chrome_send',
         'externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }