[Sync] Make P2PNotifier emit a notification only if some enabled types changed

chrome/browser/sync/test/integration/two_client_passwords_sync_test.cc

 // Copyright (c) 2012 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 "base/utf_string_conversions.h"
 #include "chrome/browser/sync/profile_sync_service_harness.h"
 #include "chrome/browser/sync/test/integration/passwords_helper.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 #include "sync/internal_api/public/sessions/sync_session_snapshot.h"
@@ skipping 62 matching lines @@
   ASSERT_TRUE(SetupSync()) << "SetupSync() failed.";
   ASSERT_TRUE(AllProfilesContainSamePasswordFormsAsVerifier());
 
   ASSERT_TRUE(GetClient(1)->DisableSyncForDatatype(syncer::PASSWORDS));
   PasswordForm form = CreateTestPasswordForm(0);
   AddLogin(GetVerifierPasswordStore(), form);
   ASSERT_EQ(1, GetVerifierPasswordCount());
   AddLogin(GetPasswordStore(0), form);
   ASSERT_EQ(1, GetPasswordCount(0));
 
-  ASSERT_TRUE(GetClient(0)->AwaitMutualSyncCycleCompletion(GetClient(1)));
+  ASSERT_TRUE(GetClient(0)->AwaitFullSyncCompletion("Added a password."));
   ASSERT_TRUE(ProfileContainsSamePasswordFormsAsVerifier(0));
   ASSERT_FALSE(ProfileContainsSamePasswordFormsAsVerifier(1));
 
   ASSERT_TRUE(GetClient(1)->EnableSyncForDatatype(syncer::PASSWORDS));
   ASSERT_TRUE(AwaitQuiescence());
   ASSERT_TRUE(AllProfilesContainSamePasswordFormsAsVerifier());
   ASSERT_EQ(1, GetPasswordCount(1));
 }
 
 // TCM ID - 4649281.
@@ skipping 192 matching lines @@
   ASSERT_FALSE(AllProfilesContainSamePasswordFormsAsVerifier());
 
   // Update 1 with the correct passphrase, the password should now sync over.
   ASSERT_TRUE(GetClient(1)->AwaitPassphraseRequired());
   ASSERT_TRUE(SetDecryptionPassphrase(1, kValidPassphrase));
   ASSERT_TRUE(GetClient(1)->AwaitPassphraseAccepted());
 
   ASSERT_TRUE(GetClient(0)->AwaitMutualSyncCycleCompletion(GetClient(1)));
   ASSERT_TRUE(AllProfilesContainSamePasswordFormsAsVerifier());
 }