arc: Prepare ArcAuthEndpoint flag for finch experiment.

chrome/browser/chromeos/arc/arc_auth_service.cc

 // Copyright 2015 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/arc_auth_service.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/chromeos/arc/arc_auth_code_fetcher.h"
 #include "chrome/browser/chromeos/arc/arc_optin_uma.h"
 #include "chrome/browser/chromeos/arc/arc_optin_uma.h"
 #include "chrome/browser/chromeos/arc/arc_session_manager.h"
 #include "chrome/browser/chromeos/arc/auth/arc_robot_auth.h"
 #include "chrome/browser/chromeos/arc/policy/arc_policy_util.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chromeos/chromeos_switches.h"
 #include "components/arc/arc_bridge_service.h"
+#include "components/arc/arc_features.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace arc {
 namespace {
 
 ArcAuthService* g_arc_auth_service = nullptr;
 
 constexpr uint32_t kMinVersionForOnAccountInfoReady = 5;
 
 // Convers mojom::ArcSignInFailureReason into ProvisiningResult.
@@ skipping 188 matching lines @@
 
   // In Kiosk mode, use Robot auth code fetching.
   if (ArcSessionManager::IsArcKioskMode()) {
     arc_robot_auth_.reset(new ArcRobotAuth());
     arc_robot_auth_->FetchRobotAuthCode(
         base::Bind(&ArcAuthService::OnRobotAuthCodeFetched,
                    weak_ptr_factory_.GetWeakPtr()));
     return;
   }
 
-  // If endpoint is passed via command line flag, use automatic auth code
-  // fetching.
-  const base::CommandLine* command_line =
-      base::CommandLine::ForCurrentProcess();
-  std::string auth_endpoint;
-  if (command_line->HasSwitch(chromeos::switches::kArcUseAuthEndpoint)) {
-    auth_endpoint = command_line->GetSwitchValueASCII(
-        chromeos::switches::kArcUseAuthEndpoint);
-  }
-  if (!auth_endpoint.empty()) {
+  // Optionally retrive auth code in silent mode.
+  if (base::FeatureList::IsEnabled(arc::kArcUseAuthEndpointFeature)) {
     DCHECK(!auth_code_fetcher_);
     auth_code_fetcher_ = base::MakeUnique<ArcAuthCodeFetcher>(
         ArcSessionManager::Get()->profile(),
-        ArcSessionManager::Get()->auth_context(), auth_endpoint);
+        ArcSessionManager::Get()->auth_context());
     auth_code_fetcher_->Fetch(base::Bind(&ArcAuthService::OnAuthCodeFetched,
                                          weak_ptr_factory_.GetWeakPtr()));
     return;
   }
 
   // Otherwise, show LSO page to user after HTTP context preparation, and let
   // them click "Sign in" button.
   ArcSessionManager::Get()->auth_context()->Prepare(base::Bind(
       &ArcAuthService::OnContextPrepared, weak_ptr_factory_.GetWeakPtr()));
 }
@@ skipping 79 matching lines @@
   if (support_host->ui_page() == ArcSupportHost::UIPage::ERROR) {
     // This case is handled by ArcSessionManager::OnRetryClicked().
     return;
   }
 
   ArcSessionManager::Get()->auth_context()->Prepare(base::Bind(
       &ArcAuthService::OnContextPrepared, weak_ptr_factory_.GetWeakPtr()));
 }
 
 }  // namespace arc