[Mac] Clean up SadTabView and let SadTabController provide its content

chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h

Index: chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h
diff --git a/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h b/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h
index 3f1eb330dc15e08383eedd86c35bb3f9fb05b278..20acf9ffb87c1f3f41558cbcf14c808887c5aaad 100644
--- a/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h
+++ b/chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h
@@ -38,11 +38,7 @@ class SadTabCocoa : public SadTab {
 }  // namespace chrome
 
 // A controller class that manages the SadTabView (aka "Aw Snap" or crash page).
-@interface SadTabController : NSViewController {
- @private
-  content::WebContents* webContents_;  // Weak reference.
-  base::scoped_nsobject<SadTabView> sadTabView_;
-}
+@interface SadTabController : NSViewController
 
 // Designated initializer.
 - (id)initWithWebContents:(content::WebContents*)webContents;