Add flag for enabling/disabling video fullscreen detection

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 2547 matching lines @@
 
   if (is_android) {
     sources += [
       "after_startup_task_utils_android.cc",
       "after_startup_task_utils_android.h",
       "android/accessibility/font_size_prefs_android.cc",
       "android/accessibility/font_size_prefs_android.h",
       "android/activity_type_ids.cc",
       "android/activity_type_ids.h",
       "android/android_theme_resources.h",
+      "android/app_hooks.cc",
+      "android/app_hooks.h",
       "android/appmenu/app_menu_drag_helper.cc",
       "android/appmenu/app_menu_drag_helper.h",
       "android/background_sync_launcher_android.cc",
       "android/background_sync_launcher_android.h",
       "android/banners/app_banner_infobar_delegate_android.cc",
       "android/banners/app_banner_infobar_delegate_android.h",
       "android/banners/app_banner_manager_android.cc",
       "android/banners/app_banner_manager_android.h",
       "android/bookmarks/bookmark_bridge.cc",
       "android/bookmarks/bookmark_bridge.h",
@@ skipping 1344 matching lines @@
       "chrome_browser_main_extra_parts_exo.cc",
       "chrome_browser_main_extra_parts_exo.h",
     ]
   }
 }
 
 if (is_android) {
   generate_jni("jni_headers") {
     sources = [
       "../android/java/src/org/chromium/chrome/browser/AfterStartupTaskUtils.java",
+      "../android/java/src/org/chromium/chrome/browser/AppHooks.java",
       "../android/java/src/org/chromium/chrome/browser/ApplicationLifetime.java",
       "../android/java/src/org/chromium/chrome/browser/BackgroundSyncLauncher.java",
       "../android/java/src/org/chromium/chrome/browser/BluetoothChooserDialog.java",
       "../android/java/src/org/chromium/chrome/browser/ChromeApplication.java",
       "../android/java/src/org/chromium/chrome/browser/ChromeBackupAgent.java",
       "../android/java/src/org/chromium/chrome/browser/ChromeBackupWatcher.java",
       "../android/java/src/org/chromium/chrome/browser/ChromeFeatureList.java",
       "../android/java/src/org/chromium/chrome/browser/ChromeHttpAuthHandler.java",
       "../android/java/src/org/chromium/chrome/browser/DevToolsServer.java",
       "../android/java/src/org/chromium/chrome/browser/IntentHelper.java",
@@ skipping 613 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_manifest") {
   name = "preferences"
   source = "prefs/preferences_manifest.json"
 }