Componentize sad_tab

chrome/browser/ui/chrome_sad_tab_client.h

+// Copyright 2014 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_CHROME_SAD_TAB_CLIENT_H_
+#define CHROME_BROWSER_UI_CHROME_SAD_TAB_CLIENT_H_
+
+#include "base/compiler_specific.h"
+#include "components/sad_tab/sad_tab_client.h"
+
+// Chrome's implementation of SadTabClient
+class ChromeSadTabClient : public sad_tab::SadTabClient {
+ public:
+  ChromeSadTabClient();
+  virtual ~ChromeSadTabClient();
+
+  // SadTabClient:
+  virtual bool IsInBrowserShutdown() OVERRIDE;
+  virtual void ShowFeedbackPage(content::WebContents* web_contents,
+                                const std::string& description_template,
+                                const std::string& category_tag) OVERRIDE;
+};
+
+#endif  // CHROME_BROWSER_UI_CHROME_SAD_TAB_CLIENT_H_