Fix for mac xp menus not comming up at all.

layout/generic/nsContainerFrame.cpp

@@ -535,8 +535,10 @@ nsContainerFrame::SyncFrameViewAfterReflow(nsIPresContext* aPresContext,
     }
 
     // Make sure visibility is correct
-    vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
+    if (0 == (aFlags & NS_FRAME_NO_VISIBILITY)) {
-                          nsViewVisibility_kHide);
+      vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
+                            nsViewVisibility_kHide);
+    }
 
     // Make sure content transparency is correct
     if (viewIsVisible) {

layout/generic/nsContainerFrame.h

@@ -31,6 +31,7 @@
 #define NS_FRAME_NO_MOVE_FRAME        (0x0002 | NS_FRAME_NO_MOVE_VIEW)
 #define NS_FRAME_NO_SIZE_VIEW         0x0004
 #define NS_FRAME_NO_MOVE_CHILD_VIEWS  0x0008
+#define NS_FRAME_NO_VISIBILITY        0x0010
 
 /**
  * Implementation of a container frame.

layout/html/base/src/nsContainerFrame.cpp

@@ -535,8 +535,10 @@ nsContainerFrame::SyncFrameViewAfterReflow(nsIPresContext* aPresContext,
     }
 
     // Make sure visibility is correct
-    vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
+    if (0 == (aFlags & NS_FRAME_NO_VISIBILITY)) {
-                          nsViewVisibility_kHide);
+      vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
+                            nsViewVisibility_kHide);
+    }
 
     // Make sure content transparency is correct
     if (viewIsVisible) {

layout/html/base/src/nsContainerFrame.h

@@ -31,6 +31,7 @@
 #define NS_FRAME_NO_MOVE_FRAME        (0x0002 | NS_FRAME_NO_MOVE_VIEW)
 #define NS_FRAME_NO_SIZE_VIEW         0x0004
 #define NS_FRAME_NO_MOVE_CHILD_VIEWS  0x0008
+#define NS_FRAME_NO_VISIBILITY        0x0010
 
 /**
  * Implementation of a container frame.

layout/xul/base/src/nsMenuPopupFrame.cpp

@@ -188,7 +188,7 @@ nsMenuPopupFrame::Init(nsIPresContext*  aPresContext,
 void
 nsMenuPopupFrame::GetLayoutFlags(PRUint32& aFlags)
 {
-  aFlags = NS_FRAME_NO_SIZE_VIEW | NS_FRAME_NO_MOVE_VIEW /*| NS_FRAME_NO_MOVE_CHILD_VIEWS*/ ;
+  aFlags = NS_FRAME_NO_SIZE_VIEW | NS_FRAME_NO_MOVE_VIEW | NS_FRAME_NO_VISIBILITY;
 }
 
 PRBool