diff -r 000000000000 -r 6474c204b198 widget/windows/winrt/nsMetroFilePicker.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/winrt/nsMetroFilePicker.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsMetroFilePicker_h__
+#define nsMetroFilePicker_h__
+
+#include "../nsFilePicker.h"
+#include "nsString.h"
+#include "nsCOMArray.h"
+#include "nsCOMPtr.h"
+#include "nsILocalFile.h"
+
+#include "mozwrlbase.h"
+
+#include <windows.system.h>
+#include <windows.ui.core.h>
+#include <windows.foundation.h>
+#include <windows.storage.pickers.h>
+#include <windows.storage.fileproperties.h>
+
+/**
+ * Metro file picker
+ */
+
+class nsMetroFilePicker :
+  public nsBaseWinFilePicker
+{
+  typedef Microsoft::WRL::Wrappers::HString HString;
+  typedef ABI::Windows::Storage::StorageFile StorageFile;
+  typedef ABI::Windows::Foundation::AsyncStatus AsyncStatus;
+  
+public:
+  nsMetroFilePicker(); 
+  virtual ~nsMetroFilePicker();
+
+  NS_DECL_ISUPPORTS
+  
+  // nsIFilePicker (less what's in nsBaseFilePicker)
+  NS_IMETHOD GetFilterIndex(int32_t *aFilterIndex);
+  NS_IMETHOD SetFilterIndex(int32_t aFilterIndex);
+  NS_IMETHOD GetFile(nsIFile * *aFile);
+  NS_IMETHOD GetFileURL(nsIURI * *aFileURL);
+  NS_IMETHOD GetFiles(nsISimpleEnumerator **aFiles);
+  NS_IMETHOD Show(int16_t *aReturnVal); 
+  NS_IMETHOD Open(nsIFilePickerShownCallback *aCallback); 
+  NS_IMETHOD AppendFilter(const nsAString& aTitle, const nsAString& aFilter);
+  NS_IMETHOD Init(nsIDOMWindow *parent, const nsAString& title,
+                  int16_t mode);
+
+  // Async callbacks
+  HRESULT OnPickSingleFile(ABI::Windows::Foundation::IAsyncOperation<StorageFile*>* aFile, AsyncStatus aStatus);
+  HRESULT OnPickMultipleFiles(ABI::Windows::Foundation::IAsyncOperation<ABI::Windows::Foundation::Collections::IVectorView<StorageFile*>*>* aFileList, AsyncStatus aStatus);
+
+private:
+  void InitNative(nsIWidget*, const nsAString&) {};
+  nsresult ParseFiltersIntoVector(Microsoft::WRL::ComPtr<ABI::Windows::Foundation::Collections::IVector<HSTRING>>& aVector,
+                                  const nsAString& aFilter,
+                                  bool aAllowAll);
+  nsCOMArray<nsILocalFile> mFiles;
+  Microsoft::WRL::ComPtr<ABI::Windows::Storage::Pickers::IFileOpenPicker> mFileOpenPicker;
+  Microsoft::WRL::ComPtr<ABI::Windows::Storage::Pickers::IFileSavePicker> mFileSavePicker;
+  HString mFilePath;
+  HString mFirstTitle;
+  nsRefPtr<nsIFilePickerShownCallback> mCallback;
+};
+
+#endif // nsMetroFilePicker_h__