From 50b9165e8024d84e9187cc1c4a302dbfa3aad645 Mon Sep 17 00:00:00 2001
From: Timothy Nikkel <tnikkel@gmail.com>
Date: Thu, 10 Feb 2011 15:15:51 -0600
Subject: [PATCH] Bug 624452. Report the menu background as opaque if theming
 of it is not supported so it gets subpixel AA. r=roc a=blocking

---
 widget/src/windows/nsNativeThemeWin.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/widget/src/windows/nsNativeThemeWin.cpp b/widget/src/windows/nsNativeThemeWin.cpp
index e5adde390c6..f5c2997e08c 100644
--- a/widget/src/windows/nsNativeThemeWin.cpp
+++ b/widget/src/windows/nsNativeThemeWin.cpp
@@ -2243,8 +2243,13 @@ nsNativeThemeWin::GetWidgetTransparency(nsIFrame* aFrame, PRUint8 aWidgetType)
 
   HANDLE theme = GetTheme(aWidgetType);
   // For the classic theme we don't really have a way of knowing
-  if (!theme)
+  if (!theme) {
+    // menu backgrounds which can't be themed are opaque
+    if (aWidgetType == NS_THEME_MENUPOPUP) {
+      return eOpaque;
+    }
     return eUnknownTransparency;
+  }
 
   PRInt32 part, state;
   nsresult rv = GetThemePartAndState(aFrame, aWidgetType, part, state);