Add external protocol dialog for Linux....

chrome/browser/gtk/external_protocol_dialog_gtk.h

+// Copyright (c) 2009 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_GTK_EXTERNAL_PROTOCOL_DIALOG_GTK_H_
+#define CHROME_BROWSER_GTK_EXTERNAL_PROTOCOL_DIALOG_GTK_H_
+
+#include "base/time.h"
+#include "googleurl/src/gurl.h"
+
+class TabContents;
+
+typedef struct _GtkWidget GtkWidget;
+
+class ExternalProtocolDialogGtk {
+ public:
+  ExternalProtocolDialogGtk(const GURL& url, TabContents* tab_contents);
+
+ private:
+  static void OnDialogResponse(GtkWidget* widget,
+                               int response,
+                               ExternalProtocolDialogGtk* dialog);
+
+  GtkWidget* dialog_;
+  GURL url_;
+  base::Time creation_time_;
+};
+
+#endif  // CHROME_BROWSER_GTK_EXTERNAL_PROTOCOL_DIALOG_GTK_H_