diff -r 000000000000 -r 6474c204b198 layout/printing/nsPagePrintTimer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/printing/nsPagePrintTimer.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 2; 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 nsPagePrintTimer_h___
+#define nsPagePrintTimer_h___
+
+// Timer Includes
+#include "nsITimer.h"
+
+#include "nsIDocumentViewerPrint.h"
+#include "nsPrintObject.h"
+#include "mozilla/Attributes.h"
+#include "nsThreadUtils.h"
+
+class nsPrintEngine;
+
+//---------------------------------------------------
+//-- Page Timer Class
+//---------------------------------------------------
+class nsPagePrintTimer MOZ_FINAL : public nsRunnable,
+                                   public nsITimerCallback
+{
+public:
+
+  NS_DECL_ISUPPORTS
+
+  nsPagePrintTimer(nsPrintEngine* aPrintEngine,
+                   nsIDocumentViewerPrint* aDocViewerPrint,
+                   uint32_t aDelay)
+    : mPrintEngine(aPrintEngine)
+    , mDocViewerPrint(aDocViewerPrint)
+    , mDelay(aDelay)
+    , mFiringCount(0)
+    , mPrintObj(nullptr)
+    , mWatchDogCount(0)
+    , mDone(false)
+  {
+    mDocViewerPrint->IncrementDestroyRefCount();
+  }
+  ~nsPagePrintTimer();
+
+  NS_DECL_NSITIMERCALLBACK
+
+  nsresult Start(nsPrintObject* aPO);
+
+  NS_IMETHOD Run() MOZ_OVERRIDE;
+
+  void Stop();
+
+private:
+  nsresult StartTimer(bool aUseDelay);
+  nsresult StartWatchDogTimer();
+  void     StopWatchDogTimer();
+  void     Fail();
+
+  nsPrintEngine*             mPrintEngine;
+  nsCOMPtr<nsIDocumentViewerPrint> mDocViewerPrint;
+  nsCOMPtr<nsITimer>         mTimer;
+  nsCOMPtr<nsITimer>         mWatchDogTimer;
+  uint32_t                   mDelay;
+  uint32_t                   mFiringCount;
+  nsPrintObject *            mPrintObj;
+  uint32_t                   mWatchDogCount;
+  bool                       mDone;
+
+  static const uint32_t WATCH_DOG_INTERVAL  = 1000;
+  static const uint32_t WATCH_DOG_MAX_COUNT = 10;
+};
+
+
+nsresult
+NS_NewPagePrintTimer(nsPagePrintTimer **aResult);
+
+#endif /* nsPagePrintTimer_h___ */