GRC: Added Tab coordination units behind a feature flag

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 1133 matching lines @@
     "renderer_host/chrome_navigation_ui_data.cc",
     "renderer_host/chrome_navigation_ui_data.h",
     "renderer_host/chrome_render_message_filter.cc",
     "renderer_host/chrome_render_message_filter.h",
     "renderer_host/chrome_render_widget_host_view_mac_delegate.h",
     "renderer_host/chrome_render_widget_host_view_mac_delegate.mm",
     "renderer_host/chrome_render_widget_host_view_mac_history_swiper.h",
     "renderer_host/chrome_render_widget_host_view_mac_history_swiper.mm",
     "renderer_preferences_util.cc",
     "renderer_preferences_util.h",
+    "resource_coordinator/resource_coordinator_web_contents_observer.cc",
+    "resource_coordinator/resource_coordinator_web_contents_observer.h",
     "resource_delegate_mac.h",
     "resource_delegate_mac.mm",
     "resources_util.cc",
     "resources_util.h",
     "safe_browsing/chrome_cleaner/chrome_cleaner_controller_win.cc",
     "safe_browsing/chrome_cleaner/chrome_cleaner_controller_win.h",
     "safe_browsing/chrome_cleaner/chrome_cleaner_fetcher_win.cc",
     "safe_browsing/chrome_cleaner/chrome_cleaner_fetcher_win.h",
     "safe_browsing/chrome_cleaner/reporter_runner_win.cc",
     "safe_browsing/chrome_cleaner/reporter_runner_win.h",
@@ skipping 3584 matching lines @@
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }