app-shell: Introduce a ShellRendererMainDelegate.

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 125 matching lines @@
         'common/shell_extensions_client.h',
         'renderer/shell_content_renderer_client.cc',
         'renderer/shell_content_renderer_client.h',
         'renderer/shell_custom_bindings.cc',
         'renderer/shell_custom_bindings.h',
         'renderer/shell_custom_bindings.js',
         'renderer/shell_dispatcher_delegate.cc',
         'renderer/shell_dispatcher_delegate.h',
         'renderer/shell_extensions_renderer_client.cc',
         'renderer/shell_extensions_renderer_client.h',
+        'renderer/shell_renderer_main_delegate.h',
       ],
       'conditions': [
         ['chromeos==1', {
           'dependencies': [
             '<(DEPTH)/chromeos/chromeos.gyp:chromeos',
             '<(DEPTH)/ui/chromeos/ui_chromeos.gyp:ui_chromeos',
             '<(DEPTH)/ui/display/display.gyp:display',
           ],
         }],
       ],
@@ skipping 45 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
 }