Add WebstoreInlineInstaller (downloads store data, shows the install UI, and starts the install).

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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',
       'type': 'static_library',
       'dependencies': [
@@ skipping 979 matching lines @@
         'browser/extensions/extension_input_api.cc',
         'browser/extensions/extension_input_api.h',
         'browser/extensions/extension_input_ime_api.cc',
         'browser/extensions/extension_input_ime_api.h',
         'browser/extensions/extension_input_method_api.cc',
         'browser/extensions/extension_input_method_api.h',
         'browser/extensions/extension_input_module_constants.cc',
         'browser/extensions/extension_input_module_constants.h',
         'browser/extensions/extension_input_ui_api.cc',
         'browser/extensions/extension_input_ui_api.h',
+        'browser/extensions/extension_install_dialog.cc',
         'browser/extensions/extension_install_dialog.h',
         'browser/extensions/extension_install_ui.cc',
         'browser/extensions/extension_install_ui.h',
         'browser/extensions/extension_management_api.cc',
         'browser/extensions/extension_management_api.h',
         'browser/extensions/extension_mediaplayer_private_api.cc',
         'browser/extensions/extension_mediaplayer_private_api.h',
         'browser/extensions/extension_menu_manager.cc',
         'browser/extensions/extension_menu_manager.h',
         'browser/extensions/extension_message_handler.cc',
@@ skipping 140 matching lines @@
         'browser/extensions/pending_extension_manager.cc',
         'browser/extensions/pending_extension_manager.h',
         'browser/extensions/sandboxed_extension_unpacker.cc',
         'browser/extensions/sandboxed_extension_unpacker.h',
         'browser/extensions/theme_installed_infobar_delegate.cc',
         'browser/extensions/theme_installed_infobar_delegate.h',
         'browser/extensions/user_script_listener.cc',
         'browser/extensions/user_script_listener.h',
         'browser/extensions/user_script_master.cc',
         'browser/extensions/user_script_master.h',
+        'browser/extensions/webstore_inline_installer.cc',
+        'browser/extensions/webstore_inline_installer.h',
         'browser/extensions/webstore_install_helper.cc',
         'browser/extensions/webstore_install_helper.h',
         'browser/external_protocol/external_protocol_handler.cc',
         'browser/external_protocol/external_protocol_handler.h',
         'browser/external_protocol/external_protocol_observer.cc',
         'browser/external_protocol/external_protocol_observer.h',
         'browser/external_tab_container_win.cc',
         'browser/external_tab_container_win.h',
         'browser/favicon/favicon_handler.cc',
         'browser/favicon/favicon_handler.h',
@@ skipping 3718 matching lines @@
               # weak imports in dependents, who still must #include
               # closure_blocks_leopard_compat.h to get weak imports.
               'type': 'none',
             }],
           ],
         },
       ],
     }],
   ],
 }