Revert of [site isolation] cross-site transfers should track the RenderFrameHost, not the View

content/browser/loader/cross_site_resource_handler.cc

Index: content/browser/loader/cross_site_resource_handler.cc
diff --git a/content/browser/loader/cross_site_resource_handler.cc b/content/browser/loader/cross_site_resource_handler.cc
index d283b6a27eeabd2d63b2a0b8224224d05d28f7f5..3d7862ff56974f5585e39793a31ddaaae34db4a2 100644
--- a/content/browser/loader/cross_site_resource_handler.cc
+++ b/content/browser/loader/cross_site_resource_handler.cc
@@ -200,10 +200,9 @@
     return DeferForNavigationPolicyCheck(info, response, defer);
   }
 
-  bool swap_needed =
-      should_transfer ||
-      CrossSiteRequestManager::GetInstance()->HasPendingCrossSiteRequest(
-          info->GetChildID(), info->GetRenderFrameID());
+  bool swap_needed = should_transfer ||
+      CrossSiteRequestManager::GetInstance()->
+          HasPendingCrossSiteRequest(info->GetChildID(), info->GetRouteID());
 
   // If this is a download, just pass the response through without doing a
   // cross-site check.  The renderer will see it is a download and abort the
@@ -293,7 +292,7 @@
     if (has_started_response_ ||
         status.status() != net::URLRequestStatus::FAILED ||
         !CrossSiteRequestManager::GetInstance()->HasPendingCrossSiteRequest(
-            info->GetChildID(), info->GetRenderFrameID())) {
+            info->GetChildID(), info->GetRouteID())) {
       next_handler_->OnResponseCompleted(status, security_info, defer);
       return;
     }