MacViews: Use native SadTabView in mac_views_browser.

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

 // 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.
 
 #include "chrome/browser/ui/cocoa/tab_contents/sad_tab_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #import "chrome/browser/ui/cocoa/tab_contents/sad_tab_view_cocoa.h"
+#include "chrome/common/url_constants.h"
 #include "content/public/browser/web_contents.h"
 
+using content::OpenURLParams;
+using content::Referrer;
+
 namespace chrome {
 
 SadTab* SadTab::Create(content::WebContents* web_contents, SadTabKind kind) {
   return new SadTabCocoa(web_contents);
 }
 
 SadTabCocoa::SadTabCocoa(content::WebContents* web_contents)
     : web_contents_(web_contents) {
 }
 
@@ skipping 43 matching lines @@
 }
 
 - (content::WebContents*)webContents {
   return webContents_;
 }
 
 - (IBAction)reloadPage:(id)sender {
   webContents_->GetController().Reload(true);
 }
 
+- (void)openLearnMoreAboutCrashLink:(id)sender {
+  OpenURLParams params(GURL(chrome::kCrashReasonURL), Referrer(), CURRENT_TAB,
+                       ui::PAGE_TRANSITION_LINK, false);
+  webContents_->OpenURL(params);
+}
+
 @end