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diff --git a/chrome/views/message_box_view.h b/chrome/views/message_box_view.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_VIEWS_MESSAGE_BOX_VIEW_VIEW_H__
+#define CHROME_VIEWS_MESSAGE_BOX_VIEW_VIEW_H__
+
+#include <string>
+
+#include "base/task.h"
+#include "chrome/views/checkbox.h"
+#include "chrome/views/image_view.h"
+#include "chrome/views/label.h"
+#include "chrome/views/text_field.h"
+#include "chrome/views/view.h"
+
+// This class displays a message box within a constrained window
+// with options for a message, a prompt, and OK and Cancel buttons.
+class MessageBoxView : public ChromeViews::View {
+ public:
+  // flags
+  static const int kFlagHasOKButton = 0x1;
+  static const int kFlagHasCancelButton = 0x2;
+  static const int kFlagHasPromptField = 0x4;
+  static const int kFlagHasMessage = 0x8;
+
+  static const int kIsConfirmMessageBox = kFlagHasMessage |
+                                          kFlagHasOKButton |
+                                          kFlagHasCancelButton;
+  static const int kIsJavascriptAlert = kFlagHasOKButton | kFlagHasMessage;
+  static const int kIsJavascriptConfirm = kIsJavascriptAlert |
+                                          kFlagHasCancelButton;
+  static const int kIsJavascriptPrompt = kIsJavascriptConfirm |
+                                         kFlagHasPromptField;
+
+  MessageBoxView(int dialog_flags,
+                 const std::wstring& message,
+                 const std::wstring& default_prompt,
+                 int message_width);
+
+  MessageBoxView(int dialog_flags,
+                 const std::wstring& message,
+                 const std::wstring& default_prompt);
+
+  // Returns user entered data in the prompt field.
+  std::wstring GetInputText();
+
+  // Returns true if a checkbox is selected, false otherwise. (And false if
+  // the message box has no checkbox.)
+  bool IsCheckBoxSelected();
+
+  // Adds |icon| to the upper left of the message box or replaces the current
+  // icon. To start out, the message box has no icon.
+  void SetIcon(const SkBitmap& icon);
+
+  // Adds a checkbox with the specified label to the message box if this is the
+  // first call. Otherwise, it changes the label of the current checkbox. To
+  // start, the message box has no checkbox until this function is called.
+  void SetCheckBoxLabel(const std::wstring& label);
+
+ protected:
+  // Layout and Painting functions.
+  virtual void ViewHierarchyChanged(bool is_add,
+                                    ChromeViews::View* parent,
+                                    ChromeViews::View* child);
+
+ private:
+  // Called after ViewHierarchyChanged's call stack unwinds and returns to the
+  // message loop to focus the first focusable element in the dialog box.
+  void FocusFirstFocusableControl();
+
+  // Sets up the layout manager and initializes the prompt field. This should
+  // only be called once, from the constructor.
+  void Init(int dialog_flags, const std::wstring& default_prompt);
+
+  // Sets up the layout manager based on currently initialized views. Should be
+  // called when a view is initialized or changed.
+  void ResetLayoutManager();
+
+  // Message for the message box.
+  ChromeViews::Label* message_label_;
+
+  // Input text field for the message box.
+  ChromeViews::TextField* prompt_field_;
+
+  // Icon displayed in the upper left corner of the message box.
+  ChromeViews::ImageView* icon_;
+
+  // Checkbox for the message box.
+  ChromeViews::CheckBox* check_box_;
+
+  // Maximum width of the message label.
+  int message_width_;
+
+  ScopedRunnableMethodFactory<MessageBoxView> focus_grabber_factory_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(MessageBoxView);
+};
+
+#endif // CHROME_VIEWS_MESSAGE_BOX_VIEW_VIEW_H__