[sync] Isolate FOREIGN_SESSION_UPDATED notification in ProfileSyncService

chrome/browser/android/foreign_session_helper.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/android/foreign_session_helper.h"
 
 #include <jni.h>
 
 #include "base/android/jni_string.h"
 #include "base/prefs/pref_service.h"
@@ skipping 140 matching lines @@
 }
 
 ForeignSessionHelper::ForeignSessionHelper(Profile* profile)
     : profile_(profile), scoped_observer_(this) {
   ProfileSyncService* service = ProfileSyncServiceFactory::GetInstance()->
       GetForProfile(profile);
 
   // NOTE: The ProfileSyncService can be null in tests.
   if (service)
     scoped_observer_.Add(service);
-
-  registrar_.Add(this, chrome::NOTIFICATION_FOREIGN_SESSION_UPDATED,
-                 content::Source<Profile>(profile));
 }
 
 ForeignSessionHelper::~ForeignSessionHelper() {
 }
 
 void ForeignSessionHelper::Destroy(JNIEnv* env, jobject obj) {
   delete this;
 }
 
 jboolean ForeignSessionHelper::IsTabSyncEnabled(JNIEnv* env, jobject obj) {
@@ skipping 17 matching lines @@
 }
 
 void ForeignSessionHelper::FireForeignSessionCallback() {
   if (callback_.is_null())
     return;
 
   JNIEnv* env = AttachCurrentThread();
   Java_ForeignSessionCallback_onUpdated(env, callback_.obj());
 }
 
-void ForeignSessionHelper::Observe(
-    int type, const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  switch (type) {
-    case chrome::NOTIFICATION_FOREIGN_SESSION_UPDATED:
-      FireForeignSessionCallback();
-      break;
-    default:
-      NOTREACHED();
-  }
-}
-
 void ForeignSessionHelper::OnSyncConfigurationCompleted() {
   FireForeignSessionCallback();
 }
 
+void ForeignSessionHelper::OnForeignSessionUpdated() {
+  FireForeignSessionCallback();
+}
+
 jboolean ForeignSessionHelper::GetForeignSessions(JNIEnv* env,
                                                   jobject obj,
                                                   jobject result) {
   OpenTabsUIDelegate* open_tabs = GetOpenTabsUIDelegate(profile_);
   if (!open_tabs)
     return false;
 
   std::vector<const sync_driver::SyncedSession*> sessions;
   if (!open_tabs->GetAllForeignSessions(&sessions))
     return false;
@@ skipping 101 matching lines @@
                                                 jstring session_tag) {
   OpenTabsUIDelegate* open_tabs = GetOpenTabsUIDelegate(profile_);
   if (open_tabs)
     open_tabs->DeleteForeignSession(ConvertJavaStringToUTF8(env, session_tag));
 }
 
 // static
 bool ForeignSessionHelper::RegisterForeignSessionHelper(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }