Diagnose renderer-side crash with browser-side stack trace.

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 1b552accdc63aeacc1629c4e35e8b9350a96a190..180ef0859d298eaab175b295b5841585cc0481ff 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -250,6 +250,11 @@ class CONTENT_EXPORT RenderViewHostImpl : public RenderViewHost,
   // Creates a full screen RenderWidget.
   void CreateNewFullscreenWidget(int32_t route_id);
 
+  // TODO(creis): Remove after debugging https:/crbug.com/575245.
+  int main_frame_routing_id() const {
+    return main_frame_routing_id_;
+  }
+
   void set_main_frame_routing_id(int routing_id) {
     main_frame_routing_id_ = routing_id;
   }