Remove app_shell chrome.shell API and ShellAppWindow

extensions/BUILD.gn

 # 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.
 
 import("//tools/grit/grit_rule.gni")
 import("//tools/grit/repack.gni")
 
 # GYP version: extensions/extensions_resources.gyp:extensions_resources
 group("extensions_resources") {
   deps = [
@@ skipping 105 matching lines @@
     "$root_gen_dir/chrome/extensions_api_resources.pak",
     # TODO(jamescook): Extract the extension/app related resources
     # from generated_resources_en-US.pak. http://crbug.com/397250
     "$root_gen_dir/chrome/generated_resources_en-US.pak",
     "$root_gen_dir/chrome/renderer_resources_100_percent.pak",
     "$root_gen_dir/content/app/strings/content_strings_en-US.pak",
     "$root_gen_dir/content/content_resources.pak",
     "$root_gen_dir/content/shell/shell_resources.pak",
     "$root_gen_dir/extensions/extensions_renderer_resources.pak",
     "$root_gen_dir/extensions/extensions_resources.pak",
-    "$root_gen_dir/extensions/shell/app_shell_resources.pak",
     "$root_gen_dir/extensions/strings/extensions_strings_en-US.pak",
     "$root_gen_dir/ui/resources/ui_resources_100_percent.pak",
     "$root_gen_dir/ui/strings/app_locale_settings_en-US.pak",
     "$root_gen_dir/ui/strings/ui_strings_en-US.pak",
     "$root_gen_dir/webkit/devtools_resources.pak",
   ]
 
   output = "$root_out_dir/extensions_shell_and_test.pak"
 
   deps = [
     ":extensions_resources",
     # Need extension related resources in common_resources.pak and
     # renderer_resources_100_percent.pak
     "//chrome:resources",
     # Need dev-tools related resources in shell_resources.pak and
     # devtools_resources.pak.
     "//content/browser/devtools:resources",
     "//content/shell:resources",
     "//content:resources",
-    "//extensions/shell:resources",
     "//extensions/strings",
     "//ui/resources",
     "//ui/strings",
   ]
 }
 
 # TODO(GYP): Enable this link errors are fixed.
 # This gives a link error in web_modal that is very mysterious. The GYP build
 # doesn't seem to pull in web_content_modal_dialog_manager.o since the build
 # does not have a reference to CreateNativeWebModalManager but it still links.
@@ skipping 99 matching lines @@
     "//third_party/leveldatabase",
   ]
 
   if (is_win) {
     deps += [
       "//base/allocator",
     ]
   }
 }
 }