Ensure Sync access token is revoked when user is signed out.

chrome/browser/sync/profile_sync_service_unittest.cc

Index: chrome/browser/sync/profile_sync_service_unittest.cc
diff --git a/chrome/browser/sync/profile_sync_service_unittest.cc b/chrome/browser/sync/profile_sync_service_unittest.cc
index a3efd9658481be09e11fd0181e5c48a3a481edbe..36059fa64a5ef537e6048c66bc40023dc949040f 100644
--- a/chrome/browser/sync/profile_sync_service_unittest.cc
+++ b/chrome/browser/sync/profile_sync_service_unittest.cc
@@ -684,6 +684,27 @@ TEST_F(ProfileSyncServiceTest, RevokeAccessTokenFromTokenService) {
   EXPECT_TRUE(service()->GetAccessTokenForTest().empty());
 }
 
+TEST_F(ProfileSyncServiceTest, SignOutRevokeAccessToken) {
+  CreateService(browser_sync::AUTO_START);
+  IssueTestTokens();
+  ExpectDataTypeManagerCreation(1, GetDefaultConfigureCalledCallback());
+  ExpectSyncBackendHostCreation(1);
+  InitializeForNthSync();
+  EXPECT_TRUE(service()->IsSyncActive());
+
+  std::string primary_account_id =
+      SigninManagerFactory::GetForProfile(profile())
+          ->GetAuthenticatedAccountId();
+  ProfileOAuth2TokenServiceFactory::GetForProfile(profile())
+      ->LoadCredentials(primary_account_id);
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(service()->GetAccessTokenForTest().empty());
+
+  SigninManagerFactory::GetForProfile(profile())
+      ->SignOut(signin_metrics::SIGNOUT_TEST);
+  EXPECT_TRUE(service()->GetAccessTokenForTest().empty());
+}
+
 #if defined(ENABLE_PRE_SYNC_BACKUP)
 TEST_F(ProfileSyncServiceTest, DontStartBackupOnBrowserStart) {
   CreateServiceWithoutSignIn();