Remove old diagnostic crash reports.

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 105881226da37db55962d1f95d80ba444cac0582..6f8ff7f11cd493221ba91f4345aefd8beb9642e1 100644
--- a/content/browser/renderer_host/render_view_host_impl.h
+++ b/content/browser/renderer_host/render_view_host_impl.h
@@ -204,11 +204,6 @@ class CONTENT_EXPORT RenderViewHostImpl : public RenderViewHost,
   // re-entrantly.
   void PostRenderViewReady();
 
-  // 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;
   }