[Webview, Child Accounts] Automatically sign in to Chrome if needed.

chrome/browser/supervised_user/supervised_user_resource_throttle.cc

 // Copyright 2014 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/supervised_user/supervised_user_resource_throttle.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "chrome/browser/supervised_user/supervised_user_interstitial.h"
@@ skipping 53 matching lines @@
           return FILTERING_BEHAVIOR_BLOCK_BLACKLIST;
         case supervised_user_error_page::ASYNC_CHECKER:
           return FILTERING_BEHAVIOR_BLOCK_SAFESITES;
         case supervised_user_error_page::WHITELIST:
           NOTREACHED();
           break;
         case supervised_user_error_page::MANUAL:
           return FILTERING_BEHAVIOR_BLOCK_MANUAL;
         case supervised_user_error_page::DEFAULT:
           return FILTERING_BEHAVIOR_BLOCK_DEFAULT;
+        case supervised_user_error_page::NOT_SIGNED_IN:
+          // Should never happen, only used for requests from Webview
+          NOTREACHED();
       }
     case SupervisedUserURLFilter::INVALID:
       NOTREACHED();
   }
   return 0;
 }
 
 int GetHistogramValueForTransitionType(ui::PageTransition transition_type) {
   int value =
       static_cast<int>(ui::PageTransitionStripQualifier(transition_type));
@@ skipping 136 matching lines @@
     Resume();
 }
 
 void SupervisedUserResourceThrottle::OnInterstitialResult(
     bool continue_request) {
   if (continue_request)
     Resume();
   else
     Cancel();
 }