Update Sad Tab help text and link.

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

 // Copyright (c) 2011 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_UI_COCOA_TAB_CONTENTS_SAD_TAB_VIEW_H_
 #define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_SAD_TAB_VIEW_H_
 #pragma once
 
 #include "base/memory/scoped_nsobject.h"
 #include "chrome/browser/ui/cocoa/base_view.h"
 
 #import <Cocoa/Cocoa.h>
 
-@class HyperlinkButtonCell;
+@class SadTabController;
+@class HyperlinkTextView;
 
 // A view that displays the "sad tab" (aka crash page).
 @interface SadTabView : BaseView {
  @private
   IBOutlet NSImageView* image_;
   IBOutlet NSTextField* title_;
   IBOutlet NSTextField* message_;
-  IBOutlet NSButton* linkButton_;
-  IBOutlet HyperlinkButtonCell* linkCell_;
+  IBOutlet NSTextField* helpPlaceholder_;
 
   scoped_nsobject<NSColor> backgroundColor_;
   NSSize messageSize_;
+
+  // Text fields don't work as well with embedded links as text views, but
+  // text views cannot conveniently be created in IB. The xib file contains
+  // a text field |helpPlaceholder_| that's replaced by this text view |help_|
+  // in -awakeFromNib.
+  scoped_nsobject<HyperlinkTextView> help_;
+
+  // A weak reference to the parent controller.
+  IBOutlet SadTabController* controller_;
 }
 
 // Designated initializer is -initWithFrame: .
 
-// Called by SadTabController to remove link button.
-- (void)removeLinkButton;
+// Called by SadTabController to remove the help text and link.
+- (void)removeHelpText;
+
+// Sets |help_| based on |helpPlaceholder_|, sets |helpPlaceholder_| to nil.
+- (void)initializeHelpText;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_SAD_TAB_VIEW_H_