Update Sad Tab help text and link.

chrome/browser/ui/cocoa/hyperlink_text_view.h

Index: chrome/browser/ui/cocoa/hyperlink_text_view.h
diff --git a/chrome/browser/ui/cocoa/hyperlink_text_view.h b/chrome/browser/ui/cocoa/hyperlink_text_view.h
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index 0000000000000000000000000000000000000000..a9ba8d3306b160b58107066cb959d5eb14474b8c
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+++ b/chrome/browser/ui/cocoa/hyperlink_text_view.h
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+// 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.
+
+#import <Cocoa/Cocoa.h>
+
+// HyperlinkTextView is an NSTextView subclass for unselectable, linkable text.
+// This subclass doesn't show the text caret or IBeamCursor, whereas the base
+// class NSTextView displays both with full keyboard accessibility enabled.
+@interface HyperlinkTextView : NSTextView
+// Convenience function that sets the |HyperlinkTextView| contents to the
+// specified |message| with a hypertext style |link| inserted at |linkOffset|.
+// Uses the supplied |font|, |messageColor|, and |linkColor|.
+- (void)setMessageAndLink:(NSString*)message
+                 withLink:(NSString*)link
+                 atOffset:(NSUInteger)linkOffset
+                     font:(NSFont*)font
+             messageColor:(NSColor*)messageColor
+                linkColor:(NSColor*)linkColor;
+@end