arc: Implement silent OptIn mode for managed Arc.

chrome/browser/chromeos/arc/arc_android_management_checker.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/arc_android_management_checker.h"
 
 #include "base/bind.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/chromeos/arc/arc_android_management_checker_delegate.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "components/policy/core/common/cloud/device_management_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 
 namespace {
 
-constexpr int kRefreshTokenTimeoutMs = 10 * 1000;    // 10 sec.
 constexpr int kRetryTimeMinMs = 10 * 1000;           // 10 sec.
 constexpr int kRetryTimeMaxMs = 1 * 60 * 60 * 1000;  // 1 hour.
 
 policy::DeviceManagementService* GetDeviceManagementService() {
   policy::BrowserPolicyConnectorChromeOS* const connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   return connector->device_management_service();
 }
 
 }  // namespace
 
 ArcAndroidManagementChecker::ArcAndroidManagementChecker(
     ArcAndroidManagementCheckerDelegate* delegate,
     ProfileOAuth2TokenService* token_service,
-    const std::string account_id,
+    const std::string& account_id,
     bool background_mode)
     : delegate_(delegate),
       token_service_(token_service),
       account_id_(account_id),
       background_mode_(background_mode),
       retry_time_ms_(kRetryTimeMinMs),
       android_management_client_(GetDeviceManagementService(),
                                  g_browser_process->system_request_context(),
                                  account_id,
                                  token_service),
       weak_ptr_factory_(this) {
   if (token_service_->RefreshTokenIsAvailable(account_id_)) {
     StartCheck();
   } else {
+    DCHECK(background_mode_);

[khmel, 2016/06/28 20:05:38]

Now this can not happen in foreground mode so discard unused code.

     token_service_->AddObserver(this);
-    if (!background_mode_) {
-      refresh_token_timeout_.Start(
-          FROM_HERE, base::TimeDelta::FromMilliseconds(kRefreshTokenTimeoutMs),
-          this, &ArcAndroidManagementChecker::OnRefreshTokenTimeout);
-    }
   }
 }
 
 ArcAndroidManagementChecker::~ArcAndroidManagementChecker() {
   token_service_->RemoveObserver(this);
 }
 
 // static
 void ArcAndroidManagementChecker::StartClient() {
   GetDeviceManagementService()->ScheduleInitialization(0);
 }
 
 void ArcAndroidManagementChecker::OnRefreshTokenAvailable(
     const std::string& account_id) {
   if (account_id != account_id_)
     return;
   OnRefreshTokensLoaded();
 }
 
 void ArcAndroidManagementChecker::OnRefreshTokensLoaded() {
   token_service_->RemoveObserver(this);
-  refresh_token_timeout_.Stop();
-  StartCheck();
-}
-
-void ArcAndroidManagementChecker::OnRefreshTokenTimeout() {
-  DCHECK(!background_mode_);
-  VLOG(2) << "Failed to wait for refresh token for android management check.";
-  token_service_->RemoveObserver(this);
   StartCheck();
 }
 
 void ArcAndroidManagementChecker::StartCheck() {
   if (!token_service_->RefreshTokenIsAvailable(account_id_)) {
     VLOG(2) << "No refresh token is available for android management check.";
     OnAndroidManagementChecked(
         policy::AndroidManagementClient::Result::RESULT_ERROR);
     return;
   }
@@ skipping 31 matching lines @@
   if (background_mode_ &&
       result == policy::AndroidManagementClient::Result::RESULT_ERROR) {
     ScheduleCheck();
     return;
   }
 
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(&ArcAndroidManagementChecker::DispatchResult,
                             weak_ptr_factory_.GetWeakPtr(), result));
 }