[Sync] Update SyncBackendHost to forward ClearServerData to SyncManager

sync/internal_api/sync_manager_impl_unittest.cc

 // Copyright 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.
 
 // Unit tests for the SyncApi. Note that a lot of the underlying
 // functionality is provided by the Syncable layer, which has its own
 // unit tests. We'll test SyncApi specific things in this harness.
 
 #include <cstddef>
 #include <map>
@@ skipping 2643 matching lines @@
   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::RECONFIGURATION,
             params.source);
   EXPECT_TRUE(types_to_download.Equals(params.types_to_download));
   EXPECT_EQ(new_routing_info, params.routing_info);
 
   // Verify only the recently disabled types were purged.
   EXPECT_TRUE(sync_manager_.GetTypesWithEmptyProgressMarkerToken(
       ProtocolTypes()).Equals(disabled_types));
 }
 
+// Test that SyncManager::ClearServerData invokes the scheduler.
+TEST_F(SyncManagerTestWithMockScheduler, ClearServerData) {
+  EXPECT_CALL(*scheduler(), Start(SyncScheduler::CLEAR_SERVER_DATA_MODE, _));
+  CallbackCounter callback_counter;
+  sync_manager_.ClearServerData(base::Bind(
+      &CallbackCounter::Callback, base::Unretained(&callback_counter)));
+  PumpLoop();
+  EXPECT_EQ(1, callback_counter.times_called());
+}
+
 // Test that PurgePartiallySyncedTypes purges only those types that have not
 // fully completed their initial download and apply.
 TEST_F(SyncManagerTest, PurgePartiallySyncedTypes) {
   ModelSafeRoutingInfo routing_info;
   GetModelSafeRoutingInfo(&routing_info);
   ModelTypeSet enabled_types = GetRoutingInfoTypes(routing_info);
 
   UserShare* share = sync_manager_.GetUserShare();
 
   // The test harness automatically initializes all types in the routing info.
@@ skipping 652 matching lines @@
 // SyncManagerInitInvalidStorageTest::GetFactory will return
 // DirectoryBackingStore that ensures that SyncManagerImpl::OpenDirectory fails.
 // SyncManagerImpl initialization is done in SyncManagerTest::SetUp. This test's
 // task is to ensure that SyncManagerImpl reported initialization failure in
 // OnInitializationComplete callback.
 TEST_F(SyncManagerInitInvalidStorageTest, FailToOpenDatabase) {
   EXPECT_FALSE(initialization_succeeded_);
 }
 
 }  // namespace syncer