This adds some plumbing for propagating the status and error code of a

chrome/browser/renderer_host/render_widget_host_view_mac.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 #import <QuartzCore/CALayer.h>
@@ skipping 179 matching lines @@
   virtual bool IsShowing();
   virtual gfx::Rect GetViewBounds() const;
   virtual void UpdateCursor(const WebCursor& cursor);
   virtual void SetIsLoading(bool is_loading);
   virtual void ImeUpdateTextInputState(WebKit::WebTextInputType state,
                                        const gfx::Rect& caret_rect);
   virtual void ImeCancelComposition();
   virtual void DidUpdateBackingStore(
       const gfx::Rect& scroll_rect, int scroll_dx, int scroll_dy,
       const std::vector<gfx::Rect>& copy_rects);
-  virtual void RenderViewGone();
+  virtual void RenderViewGone(base::TerminationStatus status,
+                              int error_code);
   virtual void WillDestroyRenderWidget(RenderWidgetHost* rwh) {};
   virtual void Destroy();
   virtual void SetTooltipText(const std::wstring& tooltip_text);
   virtual void SelectionChanged(const std::string& text);
   virtual BackingStore* AllocBackingStore(const gfx::Size& size);
   virtual VideoLayer* AllocVideoLayer(const gfx::Size& size);
   virtual void ShowPopupWithItems(gfx::Rect bounds,
                                   int item_height,
                                   double item_font_size,
                                   int selected_item,
@@ skipping 128 matching lines @@
   // Whether or not web accessibility is enabled.
   bool renderer_accessible_;
 
   // selected text on the renderer.
   std::string selected_text_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMac);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_H_