[Sync] Clear LocalDeviceInfoProvider cache on sync DB destruction.

components/browser_sync/browser/profile_sync_service_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 "components/browser_sync/browser/profile_sync_service.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 607 matching lines @@
   auth_service()->LoadCredentials(primary_account_id);
   base::RunLoop().RunUntilIdle();
   EXPECT_FALSE(service()->GetAccessTokenForTest().empty());
 
   signin_manager()->SignOut(signin_metrics::SIGNOUT_TEST,
                             signin_metrics::SignoutDelete::IGNORE_METRIC);
   EXPECT_TRUE(service()->GetAccessTokenForTest().empty());
 }
 #endif
 
-// Verify that LastSyncedTime is cleared when the user signs out.
-TEST_F(ProfileSyncServiceTest, ClearLastSyncedTimeOnSignOut) {
+// Verify that LastSyncedTime and local DeviceInfo is cleared on sign out.
+TEST_F(ProfileSyncServiceTest, ClearDataOnSignOut) {
   IssueTestTokens();
   CreateService(ProfileSyncService::AUTO_START);
   ExpectDataTypeManagerCreation(1, GetDefaultConfigureCalledCallback());
   ExpectSyncBackendHostCreation(1);
   InitializeForNthSync();
   EXPECT_TRUE(service()->IsSyncActive());
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_SYNC_TIME_JUST_NOW),
             service()->GetLastSyncedTimeString());
+  EXPECT_TRUE(service()->GetLocalDeviceInfoProvider()->GetLocalDeviceInfo());
 
   // Sign out.
   service()->RequestStop(ProfileSyncService::CLEAR_DATA);
   PumpLoop();
 
   EXPECT_EQ(l10n_util::GetStringUTF16(IDS_SYNC_TIME_NEVER),
             service()->GetLastSyncedTimeString());
+  EXPECT_FALSE(service()->GetLocalDeviceInfoProvider()->GetLocalDeviceInfo());
 }
 
 // Verify that the disable sync flag disables sync.
 TEST_F(ProfileSyncServiceTest, DisableSyncFlag) {
   base::CommandLine::ForCurrentProcess()->AppendSwitch(switches::kDisableSync);
   EXPECT_FALSE(ProfileSyncService::IsSyncAllowedByFlag());
 }
 
 // Verify that no disable sync flag enables sync.
 TEST_F(ProfileSyncServiceTest, NoDisableSyncFlag) {
@@ skipping 252 matching lines @@
 // dereferenced in OnSyncCycleCompleted. The fix is to use find() to check if
 // entry for sessions exists in map.
 TEST_F(ProfileSyncServiceTest, ValidPointersInDTCMap) {
   CreateService(ProfileSyncService::AUTO_START);
   service()->OnSessionRestoreComplete();
   service()->OnSyncCycleCompleted();
 }
 
 }  // namespace
 }  // namespace browser_sync