diff -r 000000000000 -r 6474c204b198 widget/windows/winrt/UIAAccessibilityBridge.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/winrt/UIAAccessibilityBridge.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+/* -*- 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/. */
+
+#pragma once
+
+#if defined(ACCESSIBILITY)
+
+#include "nsCOMPtr.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsServiceManagerUtils.h"
+#include "mozilla/a11y/Accessible.h"
+
+#include "mozwrlbase.h"
+
+namespace mozilla {
+namespace widget {
+namespace winrt {
+
+// Connects to our accessibility framework to receive
+// events and query the dom.
+class AccessibilityBridge : public nsIObserver
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIOBSERVER
+
+  AccessibilityBridge() {}
+
+  ~AccessibilityBridge() {
+    Disconnect();
+  }
+
+  bool Init(IUnknown* aBridge, mozilla::a11y::Accessible* aPtr) {
+    mAccess = aPtr;
+    mBridge = aBridge;
+    return Connect();
+  }
+
+  bool Connect() {
+    nsresult rv;
+
+    nsCOMPtr<nsIObserverService> observerService = 
+      do_GetService("@mozilla.org/observer-service;1", &rv);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+    rv = observerService->AddObserver(this, "accessible-event", false);
+    if (NS_FAILED(rv)) {
+      return false;
+    }
+    return true;
+  }
+
+  bool Connected() {
+    return mAccess ? true : false;
+  }
+
+  void Disconnect() {
+    nsresult rv;
+    nsCOMPtr<nsIObserverService> observerService = 
+      do_GetService("@mozilla.org/observer-service;1", &rv);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("failed to get observersvc on shutdown.");
+      return;
+    }
+    observerService->RemoveObserver(this, "accessible-event");
+    mAccess = nullptr;
+  }
+
+private:
+  nsRefPtr<mozilla::a11y::Accessible> mAccess;
+  Microsoft::WRL::ComPtr<IUnknown> mBridge;
+};
+
+} } }
+
+#endif // ACCESSIBILITY