[sync] WebContentsObserver based sessions notifications

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 1255 matching lines @@
     "subresource_filter/chrome_subresource_filter_client.cc",
     "subresource_filter/chrome_subresource_filter_client.h",
     "sync/chrome_sync_client.cc",
     "sync/chrome_sync_client.h",
     "sync/glue/extensions_activity_monitor.cc",
     "sync/glue/extensions_activity_monitor.h",
     "sync/glue/sync_start_util.cc",
     "sync/glue/sync_start_util.h",
     "sync/profile_sync_service_factory.cc",
     "sync/profile_sync_service_factory.h",
-    "sync/sessions/notification_service_sessions_router.cc",
-    "sync/sessions/notification_service_sessions_router.h",
+    "sync/sessions/sync_sessions_router_tab_helper.cc",
+    "sync/sessions/sync_sessions_router_tab_helper.h",
+    "sync/sessions/sync_sessions_web_contents_router.cc",
+    "sync/sessions/sync_sessions_web_contents_router.h",
+    "sync/sessions/sync_sessions_web_contents_router_factory.cc",
+    "sync/sessions/sync_sessions_web_contents_router_factory.h",
     "sync/supervised_user_signin_manager_wrapper.cc",
     "sync/supervised_user_signin_manager_wrapper.h",
     "sync/sync_startup_tracker.cc",
     "sync/sync_startup_tracker.h",
     "tab_contents/navigation_metrics_recorder.cc",
     "tab_contents/navigation_metrics_recorder.h",
     "tab_contents/origins_seen_service_factory.cc",
     "tab_contents/origins_seen_service_factory.h",
     "tab_contents/retargeting_details.h",
     "tab_contents/tab_util.cc",
@@ skipping 336 matching lines @@
       "//net:net_with_v8",
       "//v8",
     ]
   } else {
     deps += [
       "//chrome/app/vector_icons",
       "//chrome/browser/resources:component_extension_resources",
       "//net:net",
       "//ui/vector_icons",
     ]
+    sources += [
+      "sync/sessions/sync_sessions_multi_windowed_web_contents_router.cc",
+      "sync/sessions/sync_sessions_multi_windowed_web_contents_router.h",
+    ]
   }
 
   if (is_chromeos && use_cras) {
     defines += [ "USE_CRAS" ]
   }
 
   if (toolkit_views) {
     deps += [ "//ui/views" ]
   }
 
@@ skipping 2911 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"
 }