chrome/blink: Add functionality for in-product help for media elements.

chrome/browser/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/chrome_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 2772 matching lines @@
       "android/locale/locale_manager.h",
       "android/locale/special_locale_handler.cc",
       "android/locale/special_locale_handler.h",
       "android/location_settings.h",
       "android/location_settings_impl.cc",
       "android/location_settings_impl.h",
       "android/logo_bridge.cc",
       "android/logo_bridge.h",
       "android/logo_service.cc",
       "android/logo_service.h",
+      "android/media_in_product_help_manager.cc",
+      "android/media_in_product_help_manager.h",
       "android/metrics/launch_metrics.cc",
       "android/metrics/launch_metrics.h",
       "android/metrics/uma_session_stats.cc",
       "android/metrics/uma_session_stats.h",
       "android/metrics/uma_utils.cc",
       "android/metrics/uma_utils.h",
       "android/metrics/variations_session.cc",
       "android/metrics/variations_session.h",
       "android/mojo/chrome_interface_registrar_android.cc",
       "android/mojo/chrome_interface_registrar_android.h",
@@ skipping 1808 matching lines @@
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }