Preserve page-level focus for subframe cross-process navigations.

content/browser/frame_host/cross_process_frame_connector.cc

Index: content/browser/frame_host/cross_process_frame_connector.cc
diff --git a/content/browser/frame_host/cross_process_frame_connector.cc b/content/browser/frame_host/cross_process_frame_connector.cc
index a09af6478228897801a3c1fdcd20df8cf6a96035..246be7204c9dea4e55e8d94ba8efc04117549c71 100644
--- a/content/browser/frame_host/cross_process_frame_connector.cc
+++ b/content/browser/frame_host/cross_process_frame_connector.cc
@@ -170,6 +170,13 @@ void CrossProcessFrameConnector::UpdateCursor(const WebCursor& cursor) {
     root_view->UpdateCursor(cursor);
 }
 
+bool CrossProcessFrameConnector::HasFocus() {
+  RenderWidgetHostViewBase* root_view = GetRootRenderWidgetHostView();
+  if (root_view)
+    return root_view->HasFocus();
+  return false;
+}
+
 void CrossProcessFrameConnector::OnForwardInputEvent(
     const blink::WebInputEvent* event) {
   if (!view_)