Test BlockingLoginTestInstance with enabled webview

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc

Index: chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
diff --git a/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc b/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
index 392968018c716d363f7168a304d3e52208971dd3..7955e13ccb7eccf7d0351d8fb399d6cb6abfdd96 100644
--- a/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
+++ b/chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.cc
@@ -13,6 +13,8 @@
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/helper.h"
+#include "chrome/browser/chromeos/login/session/user_session_manager.h"
+#include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/policy/policy_oauth2_token_fetcher.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
 #include "chrome/browser/chromeos/policy/wildcard_login_checker.h"
@@ -212,7 +214,13 @@ void UserCloudPolicyManagerChromeOS::OnInitializationCompleted(
   // access token is already available.
   if (!client()->is_registered()) {
     if (wait_for_policy_fetch_) {
-      FetchPolicyOAuthTokenUsingSigninContext();
+      if (chromeos::StartupUtils::IsWebviewSigninEnabled()) {
+        OnAccessTokenAvailable(chromeos::UserSessionManager::GetInstance()
+                                   ->user_context()
+                                   .GetAccessToken());

[xiyuan, 2015/04/27 16:33:27]

The AT in user context just have oauth login scrope and might not be enough to
use with policy code. 

PolicyOAuth2TokenFetcher wraps the real fetching work and we can update it to
start with a RT. We should probably add a parallel method to
FetchPolicyOAuthTokenUsingSigninContext to start PolicyOAuth2TokenFetcher with
the refresh token.
 

[achuithb, 2015/04/27 17:54:36]

Yup, we need this for the wildcard login check. I was going to tackle this
today.

+      } else {
+        FetchPolicyOAuthTokenUsingSigninContext();
+      }
     } else if (!access_token_.empty()) {
       OnAccessTokenAvailable(access_token_);
     }