Show a notification when an ephemeral app consumes excessive disk space

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 699 matching lines @@
         'browser/extensions/extension_protocols.cc',
         'browser/extensions/extension_protocols.h',
         'browser/extensions/extension_renderer_state.cc',
         'browser/extensions/extension_renderer_state.h',
         'browser/extensions/extension_resource_protocols.cc',
         'browser/extensions/extension_resource_protocols.h',
         'browser/extensions/extension_service.cc',
         'browser/extensions/extension_service.h',
         'browser/extensions/extension_special_storage_policy.cc',
         'browser/extensions/extension_special_storage_policy.h',
+        'browser/extensions/extension_storage_monitor.cc',
+        'browser/extensions/extension_storage_monitor.h',
+        'browser/extensions/extension_storage_monitor_factory.cc',
+        'browser/extensions/extension_storage_monitor_factory.h',
         'browser/extensions/extension_sync_service.cc',
         'browser/extensions/extension_sync_service.h',
         'browser/extensions/extension_sync_service_factory.cc',
         'browser/extensions/extension_sync_service_factory.h',
         'browser/extensions/extension_system_impl.cc',
         'browser/extensions/extension_system_impl.h',
         'browser/extensions/extension_sync_bundle.cc',
         'browser/extensions/extension_sync_bundle.h',
         'browser/extensions/extension_system_factory.cc',
         'browser/extensions/extension_system_factory.h',
@@ skipping 464 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/extensions/api/cast_channel/cast_channel.proto' ],
       'variables': {
           'proto_in_dir': 'browser/extensions/api/cast_channel',
           'proto_out_dir': 'chrome/browser/extensions/api/cast_channel',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],  # 'conditions'
 }