Bug 198479. nsFrameOuterFrame doesn't actually handle CSS 'visibility', just hide its view. r+sr=bzbarsky

git-svn-id: svn://10.0.0.236/trunk@140768 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/layout/html/document/src/nsFrameFrame.cpp

@@ -173,6 +173,12 @@ public:
                               PRInt32 aModType,
                               PRInt32 aHint);
 
+  // if the content is "visibility:hidden", then just hide the view
+  // and all our contents. We don't extend "visibility:hidden" to
+  // the child content ourselves, since it belongs to a different
+  // document and CSS doesn't inherit in there.
+  virtual PRBool SupportsVisibilityHidden() { return PR_FALSE; }
+
 #ifdef ACCESSIBILITY
   NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
 #endif