Remove LOAD_SUB_FRAME load flag.

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index 9348cef93a3ee3ca9c641bd4eb4e504d006de7cd..4953a723c0be1b94cbeacbbb1f9434a0b6732ac4 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -377,9 +377,13 @@ int ChromeNetworkDelegate::OnBeforeURLRequest(
   // TODO(joaodasilva): This prevents extensions from seeing URLs that are
   // blocked. However, an extension might redirect the request to another URL,
   // which is not blocked.
+
+  const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
   int error = net::ERR_BLOCKED_BY_ADMINISTRATOR;
-  if (url_blacklist_manager_ &&
-      url_blacklist_manager_->IsRequestBlocked(*request, &error)) {
+  if (info && content::IsResourceTypeFrame(info->GetResourceType()) &&

[Andrew T Wilson (Slow), 2015/05/12 16:44:30]

Under what situations might info be null? I want to make sure there isn't some
way for frame loads to skip the blacklist check below...

[mmenke, 2015/05/12 16:59:13]

If a request doesn't go through the ResourceDispatcherHost (In which case, it
wouldn't be a main frame page load, either).  So most anything issued from the
browser process.

+      url_blacklist_manager_ &&
+      url_blacklist_manager_->ShouldBlockRequestForFrame(
+          request->url(), &error)) {
     // URL access blocked by policy.
     request->net_log().AddEvent(
         net::NetLog::TYPE_CHROME_POLICY_ABORTED_REQUEST,