[Desktop] Add diagnostics about loading the refresh tokens.

chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc

Index: chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc
diff --git a/chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc b/chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc
index bd7e94b975d47194515dae2c5e3672803881145f..421737b026bf42115c5016615cc978fa2a2d79c4 100644
--- a/chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc
+++ b/chrome/browser/signin/mutable_profile_oauth2_token_service_delegate_unittest.cc
@@ -282,6 +282,18 @@ TEST_F(MutableProfileOAuth2TokenServiceDelegateTest,
 }
 
 TEST_F(MutableProfileOAuth2TokenServiceDelegateTest,
+       LoadCredentialsStateEmptyPrimaryAccountId) {
+  // Ensure DB is clean.
+  oauth2_service_delegate_->RevokeAllCredentials();
+
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_NOT_STARTED,
+            oauth2_service_delegate_->GetLoadCredentialsState());
+  oauth2_service_delegate_->LoadCredentials("");
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_FINISHED_WITH_SUCCESS,
+            oauth2_service_delegate_->GetLoadCredentialsState());
+}
+
+TEST_F(MutableProfileOAuth2TokenServiceDelegateTest,
        PersistenceLoadCredentials) {
   switches::EnableAccountConsistencyForTesting(
       base::CommandLine::ForCurrentProcess());
@@ -290,8 +302,14 @@ TEST_F(MutableProfileOAuth2TokenServiceDelegateTest,
   oauth2_service_delegate_->RevokeAllCredentials();
   ResetObserverCounts();
   // Perform a load from an empty DB.
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_NOT_STARTED,
+            oauth2_service_delegate_->GetLoadCredentialsState());
   oauth2_service_delegate_->LoadCredentials("account_id");
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_IN_PROGRESS,
+            oauth2_service_delegate_->GetLoadCredentialsState());
   base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_FINISHED_WITH_SUCCESS,
+            oauth2_service_delegate_->GetLoadCredentialsState());
   EXPECT_EQ(1, start_batch_changes_);
   EXPECT_EQ(1, end_batch_changes_);
   ExpectOneTokensLoadedNotification();
@@ -310,7 +328,11 @@ TEST_F(MutableProfileOAuth2TokenServiceDelegateTest,
   ResetObserverCounts();
 
   oauth2_service_delegate_->LoadCredentials("account_id");
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_IN_PROGRESS,
+            oauth2_service_delegate_->GetLoadCredentialsState());
   base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(OAuth2TokenServiceDelegate::LOAD_CREDENTIALS_FINISHED_WITH_SUCCESS,
+            oauth2_service_delegate_->GetLoadCredentialsState());
   EXPECT_EQ(2, token_available_count_);
   EXPECT_EQ(0, token_revoked_count_);
   EXPECT_EQ(1, tokens_loaded_count_);