Prevent browser-side hit testing when page popup is selected

content/browser/renderer_host/render_widget_host_delegate.cc

Index: content/browser/renderer_host/render_widget_host_delegate.cc
diff --git a/content/browser/renderer_host/render_widget_host_delegate.cc b/content/browser/renderer_host/render_widget_host_delegate.cc
index d05825ba8efeddb0f3fc0dd90d78314477d67969..56c40ac985ee4348e09556bed7b748982f6acfa2 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.cc
+++ b/content/browser/renderer_host/render_widget_host_delegate.cc
@@ -97,6 +97,10 @@ bool RenderWidgetHostDelegate::OnUpdateDragCursor() {
   return false;
 }
 
+bool RenderWidgetHostDelegate::IsWidgetForMainFrame(RenderWidgetHostImpl*) {
+  return false;
+}
+
 bool RenderWidgetHostDelegate::AddDomainInfoToRapporSample(
     rappor::Sample* sample) {
   sample->SetStringField("Domain", "Unknown");