Integrate the Windows 8 code into the Chromium tree.

win8/metro_driver/metro_dialog_box.h

Index: win8/metro_driver/metro_dialog_box.h
diff --git a/win8/metro_driver/metro_dialog_box.h b/win8/metro_driver/metro_dialog_box.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a6a94dbc633d8f703a593fc4065abe9d6e63845
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+++ b/win8/metro_driver/metro_dialog_box.h
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+// Copyright (c) 2012 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_METRO_DRIVER_METRO_DIALOG_BOX_H_
+#define CHROME_BROWSER_UI_METRO_DRIVER_METRO_DIALOG_BOX_H_
+
+#include <windows.ui.popups.h>
+#include <string>
+
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "base/win/metro.h"
+
+// Provides functionality to display a dialog box
+class MetroDialogBox : public winui::Popups::IUICommandInvokedHandler {
+ public:
+  struct DialogBoxInfo {
+    string16 title;
+    string16 content;
+    string16 button1_label;
+    string16 button2_label;
+    base::win::MetroDialogButtonPressedHandler button1_handler;
+    base::win::MetroDialogButtonPressedHandler button2_handler;
+  };
+
+  MetroDialogBox();
+  ~MetroDialogBox();
+
+  // Displays the dialog box.
+  void Show(const DialogBoxInfo& dialog_box_info);
+
+  // Dismisses the dialog box.
+  void Dismiss();
+
+  // IUICommandInvokedHandler implementation.
+  // Dummy implementation of IUnknown. This is fine as the lifetime of this
+  // class is tied to the lifetime of the ChromeAppView instance.
+  virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** object) {
+    DVLOG(1) << __FUNCTION__;
+    CHECK(false);
+    return E_NOINTERFACE;
+  }
+
+  virtual ULONG STDMETHODCALLTYPE AddRef(void) {
+    DVLOG(1) << __FUNCTION__;
+    return 1;
+  }
+
+  virtual ULONG STDMETHODCALLTYPE Release(void) {
+    DVLOG(1) << __FUNCTION__;
+    return 1;
+  }
+
+  virtual HRESULT STDMETHODCALLTYPE Invoke(winui::Popups::IUICommand* command);
+
+ private:
+  // The actual dialog box.
+  mswr::ComPtr<winui::Popups::IMessageDialog> dialog_box_;
+  DialogBoxInfo dialog_box_info_;
+};
+
+#endif  // CHROME_BROWSER_UI_METRO_DRIVER_METRO_DIALOG_BOX_H_
+