added windows.h since it is no longer provided by NSPR

gfx/src/windows/nsFontMetricsWin.h

@@ -19,6 +19,8 @@
 #ifndef nsFontMetricsWin_h__
 #define nsFontMetricsWin_h__
 
+#include <windows.h>
+
 #include "nsIFontMetrics.h"
 #include "nsFont.h"
 #include "nsString.h"

gfx/src/windows/nsImageWin.h

@@ -19,6 +19,7 @@
 #ifndef nsImageWin_h___
 #define nsImageWin_h___
 
+#include <windows.h>
 #include "nsIImage.h"
 
 class nsImageWin : public nsIImage