diff -r 000000000000 -r 6474c204b198 widget/windows/nsWindowDbg.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/nsWindowDbg.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* -*- 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 WindowDbg_h__
+#define WindowDbg_h__
+
+/*
+ * nsWindowDbg - Debug related utilities for nsWindow.
+ */
+
+#include "nsWindowDefs.h"
+
+// Enabled main event loop debug event output
+//#define EVENT_DEBUG_OUTPUT
+
+// Enables debug output for popup rollup hooks
+//#define POPUP_ROLLUP_DEBUG_OUTPUT
+
+// Enable window size and state debug output
+//#define WINSTATE_DEBUG_OUTPUT
+
+// nsIWidget defines a set of debug output statements
+// that are called in various places within the code.
+//#define WIDGET_DEBUG_OUTPUT
+
+// Enable IS_VK_DOWN debug output
+//#define DEBUG_VK
+
+// Main event loop debug output flags
+#if defined(EVENT_DEBUG_OUTPUT)
+#define SHOW_REPEAT_EVENTS      true
+#define SHOW_MOUSEMOVE_EVENTS   false
+#endif // defined(EVENT_DEBUG_OUTPUT)
+
+#if defined(POPUP_ROLLUP_DEBUG_OUTPUT) || defined(EVENT_DEBUG_OUTPUT) || 1
+void PrintEvent(UINT msg, bool aShowAllEvents, bool aShowMouseMoves);
+#endif // defined(POPUP_ROLLUP_DEBUG_OUTPUT) || defined(EVENT_DEBUG_OUTPUT)
+
+#if defined(POPUP_ROLLUP_DEBUG_OUTPUT)
+typedef struct {
+  char * mStr;
+  int    mId;
+} MSGFEventMsgInfo;
+
+#define DISPLAY_NMM_PRT(_arg) PR_LOG(gWindowsLog, PR_LOG_ALWAYS, ((_arg)));
+#else
+#define DISPLAY_NMM_PRT(_arg)
+#endif // defined(POPUP_ROLLUP_DEBUG_OUTPUT)
+
+#if defined(DEBUG)
+void DDError(const char *msg, HRESULT hr);
+#endif // defined(DEBUG)
+
+#if defined(DEBUG_VK)
+bool is_vk_down(int vk);
+#define IS_VK_DOWN is_vk_down
+#else
+#define IS_VK_DOWN(a) (GetKeyState(a) < 0)
+#endif // defined(DEBUG_VK)
+
+#endif /* WindowDbg_h__ */