Fix <webview> subframe resource loads with PlzNavigate.

extensions/browser/extension_protocols.cc

Index: extensions/browser/extension_protocols.cc
diff --git a/extensions/browser/extension_protocols.cc b/extensions/browser/extension_protocols.cc
index d2c53958ab69341ff8bed0ec408e4da13d9cbaaa..c231083a1b2533c7e094c3d88a128a4ff3f8db8d 100644
--- a/extensions/browser/extension_protocols.cc
+++ b/extensions/browser/extension_protocols.cc
@@ -36,6 +36,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/common/browser_side_navigation_policy.h"
+#include "content/public/common/resource_type.h"
 #include "crypto/secure_hash.h"
 #include "crypto/sha2.h"
 #include "extensions/browser/content_verifier.h"
@@ -369,7 +370,7 @@ bool AllowExtensionResourceLoad(net::URLRequest* request,
   // PlzNavigate: frame navigations to extensions have already been checked in
   // the ExtensionNavigationThrottle.
   if (info->GetChildID() == -1 &&
-      info->GetResourceType() == content::RESOURCE_TYPE_MAIN_FRAME &&
+      content::IsResourceTypeFrame(info->GetResourceType()) &&
       content::IsBrowserSideNavigationEnabled()) {
     return true;
   }