Fixed the copy link issue in the sad tab view

chrome/browser/ui/cocoa/tab_contents/sad_tab_view_cocoa.mm

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/cocoa/tab_contents/sad_tab_view_cocoa.h"
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #import "third_party/google_toolbox_for_mac/src/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 #import "ui/base/cocoa/controls/blue_label_button.h"
 #import "ui/base/cocoa/controls/hyperlink_text_view.h"
 #import "ui/base/cocoa/nscolor_additions.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image.h"
+#include "url/gurl.h"
 
 // Maximum width used by page contents.
 static const CGFloat kMaxContainerWidth = 600;
 // Padding between icon and title.
 static const CGFloat kIconTitleSpacing = 40;
 // Padding between title and message.
 static const CGFloat kTitleMessageSpacing = 18;
 // Padding between message and link.
 static const CGFloat kMessageLinkSpacing = 21;
 // Padding between link and button.
@@ skipping 144 matching lines @@
   // Get the help text and link.
   size_t linkOffset = 0;
   const base::string16 helpLink =
       l10n_util::GetStringUTF16(IDS_SAD_TAB_HELP_LINK);
   NSString* helpMessage(base::SysUTF16ToNSString(l10n_util::GetStringFUTF16(
       IDS_SAD_TAB_HELP_MESSAGE, helpLink, &linkOffset)));
   [help_ setMessage:helpMessage
            withFont:helpFont
        messageColor:[message_ textColor]];
   [help_ addLinkRange:NSMakeRange(linkOffset, helpLink.length())
-             withName:@""
+             withName:[NSString stringWithUTF8String:chrome::kCrashReasonURL]
             linkColor:[message_ textColor]];
   [help_ setAlignment:NSLeftTextAlignment];
   [help_ sizeToFit];
 }
 
 // Called when someone clicks on the embedded link.
 - (BOOL)textView:(NSTextView*)textView
    clickedOnLink:(id)link
          atIndex:(NSUInteger)charIndex {
   [NSApp sendAction:@selector(openLearnMoreAboutCrashLink:) to:nil from:self];
@@ skipping 45 matching lines @@
       floor((NSWidth(bounds) - frameSize.width) / 2),
       std::min(kMaxTopMargin, std::max(kTabMargin,
           NSHeight(bounds) - [container_ contentHeight] - kTabMargin)))];
 }
 
 - (NSButton*)reloadButton {
   return [container_ reloadButton];
 }
 
 @end