Introduces AppActivity and handler of chrome.shell API.

apps/shell/app_shell.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 85 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)',
         '<(SHARED_INTERMEDIATE_DIR)/apps/shell',
       ],
       'sources': [
         'app/shell_main_delegate.cc',
         'app/shell_main_delegate.h',
         'browser/api/shell/shell_api.cc',
         'browser/api/shell/shell_api.h',
         'browser/default_shell_browser_main_delegate.cc',
         'browser/default_shell_browser_main_delegate.h',
+        'browser/default_shell_app_window_controller.cc',
+        'browser/default_shell_app_window_controller.h',
         'browser/shell_app_sorting.cc',
         'browser/shell_app_sorting.h',
         'browser/shell_app_window.cc',
         'browser/shell_app_window.h',
+        'browser/shell_app_window_controller.h',
         'browser/shell_browser_context.cc',
         'browser/shell_browser_context.h',
         'browser/shell_browser_main_delegate.h',
         'browser/shell_browser_main_parts.cc',
         'browser/shell_browser_main_parts.h',
         'browser/shell_content_browser_client.cc',
         'browser/shell_content_browser_client.h',
         'browser/shell_desktop_controller.cc',
         'browser/shell_desktop_controller.h',
         'browser/shell_extension_system.cc',
@@ skipping 81 matching lines @@
         'browser/shell_browsertest.cc',
         'test/shell_test.h',
         'test/shell_test.cc',
         'test/shell_test_launcher_delegate.cc',
         'test/shell_test_launcher_delegate.h',
         'test/shell_tests_main.cc',
       ],
     },
   ],  # targets
 }