This adds some plumbing for propagating the reason for a renderer's death

chrome/browser/renderer_host/render_widget_host_view_mac.mm

Index: chrome/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/chrome/browser/renderer_host/render_widget_host_view_mac.mm b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
index 40761ae065a0d8e59421bef06e79730d616c2e4e..ee855780cf7125c9ea7c2e6afca0170ddac0a3fb 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
@@ -736,7 +736,8 @@ void RenderWidgetHostViewMac::DidUpdateBackingStore(
     HandleDelayedGpuViewHiding();
 }
 
-void RenderWidgetHostViewMac::RenderViewGone() {
+void RenderWidgetHostViewMac::RenderViewGone(base::TerminationStatus status,
+                                             int error_code) {
   // TODO(darin): keep this around, and draw sad-tab into it.
   UpdateCursorIfOverSelf();
   Destroy();