Bug 528493. Prevent script execution while initializing nsDocumentViewer. r=bzbarsky

layout/base/nsDocumentViewer.cpp

@@ -839,6 +839,11 @@ DocumentViewerImpl::InitInternal(nsIWidget* aParentWidget,
                                  PRBool aInPrintPreview,
                                  PRBool aNeedMakeCX /*= PR_TRUE*/)
 {
+  // We don't want any scripts to run here. That can cause flushing,
+  // which can cause reentry into initialization of this document viewer,
+  // which would be disastrous.
+  nsAutoScriptBlocker blockScripts;
+
   mParentWidget = aParentWidget; // not ref counted
   mBounds = aBounds;