Separate SyncData methods into three groups, local, remote, and common.

chrome/browser/sync/profile_sync_service_preference_unittest.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 <map>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
@@ skipping 311 matching lines @@
   prefs_->SetString(prefs::kHomePage, example_url0_);
   CreateRootHelper create_root(this, syncer::PREFERENCES);
   ASSERT_TRUE(StartSyncService(create_root.callback(), false));
   ASSERT_TRUE(create_root.success());
 
   const PrefService::Preference* pref =
       prefs_->FindPreference(prefs::kHomePage);
   syncer::SyncData sync_data;
   EXPECT_TRUE(pref_sync_service_->CreatePrefSyncData(pref->name(),
       *pref->GetValue(), &sync_data));
-  EXPECT_EQ(std::string(prefs::kHomePage), sync_data.GetTag());
+  EXPECT_EQ(std::string(prefs::kHomePage), sync_data.AsLocal().GetTag());
   const sync_pb::PreferenceSpecifics& specifics(sync_data.GetSpecifics().
       preference());
   EXPECT_EQ(std::string(prefs::kHomePage), specifics.name());
 
   scoped_ptr<base::Value> value(base::JSONReader::Read(specifics.value()));
   EXPECT_TRUE(pref->GetValue()->Equals(value.get()));
 }
 
 TEST_F(ProfileSyncServicePreferenceTest, ModelAssociationDoNotSyncDefaults) {
   const PrefService::Preference* pref =
@@ skipping 543 matching lines @@
   EXPECT_FALSE(pref->IsDefaultValue());
   // There should be no synced value.
   EXPECT_TRUE(GetSyncedValue(prefs::kHomePage) == NULL);
   // Switch kHomePage back to unmanaged.
   profile_->GetTestingPrefService()->RemoveManagedPref(prefs::kHomePage);
   // The original value should be picked up.
   EXPECT_TRUE(pref->IsDefaultValue());
   // There should still be no synced value.
   EXPECT_TRUE(GetSyncedValue(prefs::kHomePage) == NULL);
 }