Bug 478219. Put a script blocker around delayed editor init. r+sr=sicking

layout/forms/nsTextControlFrame.cpp

@@ -1386,6 +1386,10 @@ nsTextControlFrame::CalcIntrinsicSize(nsIRenderingContext* aRenderingContext,
 void
 nsTextControlFrame::DelayedEditorInit()
 {
+  // Make sure that editor init doesn't do things that would kill us off
+  // (especially off the script blockers it'll create for its DOM mutations).
+  nsAutoScriptBlocker scriptBlocker;
+
   // Time to mess with our security context... See comments in GetValue()
   // for why this is needed.
   nsCxPusher pusher;