Add a NavigationThrottle to the public content/ interface

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 8f6c99c269f96de55707f4f34fffa855cced9901..aed2daa51f90b3aa515e83da771d57a128753e33 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1359,8 +1359,10 @@ void RenderFrameHostImpl::OnBeginNavigation(
     scoped_refptr<ResourceRequestBody> body) {
   CHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableBrowserSideNavigation));
+  CommonNavigationParams validated_params = common_params;
+  GetProcess()->FilterURL(false, &validated_params.url);
   frame_tree_node()->navigator()->OnBeginNavigation(
-      frame_tree_node(), common_params, begin_params, body);
+      frame_tree_node(), validated_params, begin_params, body);
 }
 
 void RenderFrameHostImpl::OnDispatchLoad() {