Fix widget visibility accounting when crashing in background.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 293c3601eb5bf3074680066917183c6924cd7478..67afdf557d907ecacec254103076e5a2ac293c1f 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -1198,7 +1198,6 @@ void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
   // Reset some fields in preparation for recovering from a crash.
   ResetSizeAndRepaintPendingFlags();
   current_size_.SetSize(0, 0);
-  is_hidden_ = false;
 
   // Reset this to ensure the hung renderer mechanism is working properly.
   in_flight_event_count_ = 0;