Use a resource throttle to implement shouldOverrideUrlLoading.

android_webview/renderer/aw_content_renderer_client.cc

Index: android_webview/renderer/aw_content_renderer_client.cc
diff --git a/android_webview/renderer/aw_content_renderer_client.cc b/android_webview/renderer/aw_content_renderer_client.cc
index 548d3ecb1b05fcbff5a633e28d748a3461612ec5..1afa88afa79651bdb29757ef5f7728591ddd9142 100644
--- a/android_webview/renderer/aw_content_renderer_client.cc
+++ b/android_webview/renderer/aw_content_renderer_client.cc
@@ -106,7 +106,8 @@ bool AwContentRendererClient::HandleNavigation(
 
   // use NavigationInterception throttle to handle the call as that can
   // be deferred until after the java side has been constructed.
-  if (opener_id != MSG_ROUTING_NONE) {
+  return false; // don't call shouldOverrideUrlLoading from this function...
+  /*if (opener_id != MSG_ROUTING_NONE) {
     return false;
   }
 
@@ -116,7 +117,7 @@ bool AwContentRendererClient::HandleNavigation(
   int render_frame_id = render_frame->GetRoutingID();
   RenderThread::Get()->Send(new AwViewHostMsg_ShouldOverrideUrlLoading(
       render_frame_id, url, &ignore_navigation));
-  return ignore_navigation;
+  return ignore_navigation;*/
 }
 
 void AwContentRendererClient::RenderFrameCreated(