Add the Play Store app search to the launcher.

chrome/browser/ui/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("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 3297 matching lines @@
       "app_list/search/common/webservice_search_provider.cc",
       "app_list/search/common/webservice_search_provider.h",
       "app_list/search/extension_app_result.cc",
       "app_list/search/extension_app_result.h",
       "app_list/search/history_factory.cc",
       "app_list/search/history_factory.h",
       "app_list/search/omnibox_provider.cc",
       "app_list/search/omnibox_provider.h",
       "app_list/search/omnibox_result.cc",
       "app_list/search/omnibox_result.h",
+      "app_list/search/playstore/playstore_search_provider.cc",
+      "app_list/search/playstore/playstore_search_provider.h",
+      "app_list/search/playstore/playstore_search_result.cc",
+      "app_list/search/playstore/playstore_search_result.h",
       "app_list/search/search_controller_factory.cc",
       "app_list/search/search_controller_factory.h",
       "app_list/search/search_resource_manager.cc",
       "app_list/search/search_resource_manager.h",
       "app_list/search/search_util.cc",
       "app_list/search/search_util.h",
       "app_list/search/search_webstore_result.cc",
       "app_list/search/search_webstore_result.h",
       "app_list/search/suggestions/suggestions_search_provider.cc",
       "app_list/search/suggestions/suggestions_search_provider.h",
@@ skipping 292 matching lines @@
     deps += [
       "//chrome/test:test_support_ui",
       "//components/zoom",
     ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }