sync: Add GetAllSyncData to sync/api

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 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/extensions/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 5072 matching lines @@
   EXPECT_EQ(extension_id, (*service_->extensions()->begin())->id());
 }
 
 namespace {
   class TestSyncProcessorStub : public syncer::SyncChangeProcessor {
     virtual syncer::SyncError ProcessSyncChanges(
         const tracked_objects::Location& from_here,
         const syncer::SyncChangeList& change_list) OVERRIDE {
       return syncer::SyncError();
     }
+
+    virtual syncer::SyncDataList GetAllSyncData(
+        syncer::ModelType type) const {
+      return syncer::SyncDataList();
+    }
   };
 }
 
 TEST_F(ExtensionServiceTest, DeferredSyncStartupPreInstalledComponent) {
   InitializeEmptyExtensionService();
 
   bool flare_was_called = false;
   syncer::ModelType triggered_type(syncer::UNSPECIFIED);
   base::WeakPtrFactory<ExtensionServiceTest> factory(this);
   service_->SetSyncStartFlare(
@@ skipping 1275 matching lines @@
   EXPECT_TRUE(notifications.CheckNotifications(
       chrome::NOTIFICATION_EXTENSION_INSTALLED));
 
   EXPECT_TRUE(service_->GetInstalledExtension(id));
   EXPECT_FALSE(service_->extensions()->Contains(id));
   EXPECT_TRUE(service_->blacklisted_extensions()->Contains(id));
   EXPECT_TRUE(service_->extension_prefs()->IsExtensionBlacklisted(id));
   EXPECT_TRUE(
       service_->extension_prefs()->IsBlacklistedExtensionAcknowledged(id));
 }