Make browser_handles_top_level_requests synchronous.

content/browser/renderer_host/render_view_host_impl.h

Index: content/browser/renderer_host/render_view_host_impl.h
diff --git a/content/browser/renderer_host/render_view_host_impl.h b/content/browser/renderer_host/render_view_host_impl.h
index 8dabcfed3ffa22228640164c94e872a12cd9f690..d0c17974e9d0bcc80c0d3d9eba3a10f2c1a7073b 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -453,6 +453,12 @@ class CONTENT_EXPORT RenderViewHostImpl
                     const Referrer& referrer,
                     WindowOpenDisposition disposition,
                     int64 source_frame_id);
+  void OnMsgShouldIgnoreNavigation(const GURL& url,
+                                   const content::Referrer& referrer,
+                                   WindowOpenDisposition disposition,
+                                   int64 source_frame_id,
+                                   bool is_content_initiated,
+                                   bool* result);
   void OnMsgDidContentsPreferredSizeChange(const gfx::Size& new_size);
   void OnMsgDidChangeScrollbarsForMainFrame(bool has_horizontal_scrollbar,
                                             bool has_vertical_scrollbar);