arc: Change VLOG to LOG for ArcAuthContext and fetcher.

chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc

Index: chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc
diff --git a/chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc b/chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc
index 9c09c5311f310f87b7eff31a13582c6a753a0c97..2d1928651345d1e29a8bf8eefdb1b51076692d5f 100644
--- a/chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc
+++ b/chrome/browser/chromeos/arc/auth/arc_background_auth_code_fetcher.cc
@@ -117,7 +117,7 @@ void ArcBackgroundAuthCodeFetcher::OnGetTokenSuccess(
 void ArcBackgroundAuthCodeFetcher::OnGetTokenFailure(
     const OAuth2TokenService::Request* request,
     const GoogleServiceAuthError& error) {
-  VLOG(2) << "Failed to get LST " << error.ToString() << ".";
+  LOG(WARNING) << "Failed to get LST " << error.ToString() << ".";
   ResetFetchers();
   ReportResult(std::string(), OptInSilentAuthCode::NO_LST_TOKEN);
 }
@@ -131,7 +131,8 @@ void ArcBackgroundAuthCodeFetcher::OnURLFetchComplete(
   ResetFetchers();
 
   if (response_code != net::HTTP_OK) {
-    VLOG(2) << "Server returned wrong response code: " << response_code << ".";
+    LOG(WARNING) << "Server returned wrong response code: " << response_code
+                 << ".";
     OptInSilentAuthCode uma_status;
     if (response_code >= 400 && response_code < 500)
       uma_status = OptInSilentAuthCode::HTTP_CLIENT_FAILURE;
@@ -148,8 +149,8 @@ void ArcBackgroundAuthCodeFetcher::OnURLFetchComplete(
   std::unique_ptr<base::Value> auth_code_info =
       deserializer.Deserialize(nullptr, &error_msg);
   if (!auth_code_info) {
-    VLOG(2) << "Unable to deserialize auth code json data: " << error_msg
-            << ".";
+    LOG(WARNING) << "Unable to deserialize auth code json data: " << error_msg
+                 << ".";
     ReportResult(std::string(), OptInSilentAuthCode::RESPONSE_PARSE_FAILURE);
     return;
   }
@@ -165,7 +166,7 @@ void ArcBackgroundAuthCodeFetcher::OnURLFetchComplete(
   std::string auth_code;
   if (!auth_code_dictionary->GetString(kToken, &auth_code) ||
       auth_code.empty()) {
-    VLOG(2) << "Response does not contain auth code.";
+    LOG(WARNING) << "Response does not contain auth code.";
     ReportResult(std::string(), OptInSilentAuthCode::NO_AUTH_CODE_IN_RESPONSE);
     return;
   }