arc: Restore UMA statistics for failures in LSO flow.

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

 // Copyright 2016 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 "chrome/browser/chromeos/arc/auth/arc_manual_auth_code_fetcher.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "chrome/browser/chromeos/arc/arc_auth_context.h"
+#include "chrome/browser/chromeos/arc/arc_optin_uma.h"
 
 namespace arc {
 
 ArcManualAuthCodeFetcher::ArcManualAuthCodeFetcher(ArcAuthContext* context,
                                                    ArcSupportHost* support_host)
     : context_(context), support_host_(support_host), weak_ptr_factory_(this) {
   DCHECK(context_);
   DCHECK(support_host_);
   support_host_->AddObserver(this);
 }
@@ skipping 12 matching lines @@
 void ArcManualAuthCodeFetcher::FetchInternal() {
   DCHECK(!pending_callback_.is_null());
   context_->Prepare(base::Bind(&ArcManualAuthCodeFetcher::OnContextPrepared,
                                weak_ptr_factory_.GetWeakPtr()));
 }
 
 void ArcManualAuthCodeFetcher::OnContextPrepared(
     net::URLRequestContextGetter* request_context_getter) {
   DCHECK(!pending_callback_.is_null());
   if (!request_context_getter) {
+    UpdateOptInCancelUMA(OptInCancelReason::NETWORK_ERROR);
     support_host_->ShowError(ArcSupportHost::Error::SIGN_IN_NETWORK_ERROR,
                              false);
     return;
   }
 
   support_host_->ShowLso();
 }
 
 void ArcManualAuthCodeFetcher::OnAuthSucceeded(const std::string& auth_code) {
   DCHECK(!pending_callback_.is_null());
   base::ResetAndReturn(&pending_callback_).Run(auth_code);
 }
 
+void ArcManualAuthCodeFetcher::OnAuthFailed() {
+  // Don't report via callback. Extension is already showing more detailed
+  // information. Update only UMA here.
+  UpdateOptInCancelUMA(OptInCancelReason::NETWORK_ERROR);
+}
+
 void ArcManualAuthCodeFetcher::OnRetryClicked() {
   DCHECK(!pending_callback_.is_null());
   FetchInternal();
 }
 
 }  // namespace arc