Bug 762939 - Propagate visibility changes correctly across <iframe mozbrowser> boundaries. r=mounir,bz

docshell/base/nsDocShell.cpp

@@ -5017,12 +5017,20 @@ nsDocShell::SetIsActive(bool aIsActive)
       }
   }
 
-  // Recursively tell all of our children
+  // Recursively tell all of our children, but don't tell <iframe mozbrowser>
+  // children; they handle their state separately.
   PRInt32 n = mChildList.Count();
   for (PRInt32 i = 0; i < n; ++i) {
       nsCOMPtr<nsIDocShell> docshell = do_QueryInterface(ChildAt(i));
-      if (docshell)
-        docshell->SetIsActive(aIsActive);
+      if (!docshell) {
+          continue;
+      }
+
+      bool isBrowser = false;
+      docshell->GetIsBrowserFrame(&isBrowser);
+      if (!isBrowser) {
+          docshell->SetIsActive(aIsActive);
+      }
   }
 
   return NS_OK;