Make browser_handles_top_level_requests synchronous.

content/public/browser/render_view_host_delegate.cc

Index: content/public/browser/render_view_host_delegate.cc
diff --git a/content/public/browser/render_view_host_delegate.cc b/content/public/browser/render_view_host_delegate.cc
index 82d0e30e1e799a82fc79a98c4dc53805c4e65685..1dd86ea901a409ec7b31fb4afeda115084538b06 100644
--- a/content/public/browser/render_view_host_delegate.cc
+++ b/content/public/browser/render_view_host_delegate.cc
@@ -39,6 +39,15 @@ bool RenderViewHostDelegate::PreHandleKeyboardEvent(
   return false;
 }
 
+bool RenderViewHostDelegate::ShouldIgnoreNavigation(
+    const GURL& url,
+    const content::Referrer& referrer,
+    WindowOpenDisposition disposition,
+    int64 source_frame_id,
+    bool is_content_initiated) {
+  return false;
+}
+
 bool RenderViewHostDelegate::IsFullscreenForCurrentTab() const {
   return false;
 }