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diff --git a/chrome/browser/external_protocol_dialog.h b/chrome/browser/external_protocol_dialog.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CHROME_BROWSER_EXTERNAL_PROTOCOL_DIALOG_H__
+#define CHROME_BROWSER_EXTERNAL_PROTOCOL_DIALOG_H__
+
+#include "chrome/views/dialog_delegate.h"
+#include "googleurl/src/gurl.h"
+
+class MessageBoxView;
+class TabContents;
+
+class ExternalProtocolDialog : public ChromeViews::DialogDelegate {
+ public:
+  // Creates and runs a External Protocol dialog box.
+  // |url| - The url of the request.
+  // |render_process_host_id| and |routing_id| are used by
+  // tab_util::GetTabContentsByID to aquire the tab contents associated with
+  // this dialog.
+  static void RunExternalProtocolDialog(const GURL& url,
+                                        int render_process_host_id,
+                                        int routing_id);
+  virtual ~ExternalProtocolDialog();
+
+  // ChromeViews::DialogDelegate Methods:
+  virtual int GetDialogButtons() const;
+  virtual int GetDefaultDialogButton() const;
+  virtual std::wstring GetDialogButtonLabel(DialogButton button) const;
+  virtual std::wstring GetWindowTitle() const;
+  virtual void WindowClosing();
+  virtual bool Accept();
+
+  // ChromeViews::WindowDelegate Methods:
+  virtual bool IsAlwaysOnTop() const { return false; }
+  virtual bool IsModal() const { return false; }
+
+ private:
+  // RunExternalProtocolDialog calls this private constructor.
+  ExternalProtocolDialog(TabContents* tab_contents,
+                         const GURL& url);
+
+  // Returns the path of the application to be launched given the protocol
+  // of the requested url. Returns an empty string on failure.
+  std::wstring GetApplicationForProtocol();
+
+  // The message box view whose commands we handle.
+  MessageBoxView* message_box_view_;
+
+  // The associated TabContents.
+  TabContents* tab_contents_;
+
+  // URL of the external protocol request.
+  GURL url_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(ExternalProtocolDialog);
+};
+
+#endif // CHROME_BROWSER_EXTERNAL_PROTOCOL_DIALOG_H__