[MD History] Refactor history.html into a history-app element.

chrome/browser/resources/md_history/compiled_resources2.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': 'constants',
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
@@ skipping 24 matching lines @@
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
     {
       'target_name': 'history',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:load_time_data',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
         'constants',
+        'app',
+        '<(EXTERNS_GYP):chrome_send',
+        '../history/compiled_resources2.gyp:externs',
+      ],
+      'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
+    },
+    {
+      'target_name': 'app',
+      'dependencies': [
+        '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:util',
+        'constants',
         'history_list',
         'history_toolbar',
         'side_bar',
         'synced_device_card',
         'synced_device_manager',
         '<(EXTERNS_GYP):chrome_send',
         '../history/compiled_resources2.gyp:externs',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
@@ skipping 11 matching lines @@
     },
     {
       'target_name': 'synced_device_manager',
       'dependencies': [
         'synced_device_card',
       ],
       'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
     },
   ],
 }