Fix a stack overflow crash in the accessibility code in the renderer. The crash occurs in the

content/renderer/renderer_accessibility.cc

Index: content/renderer/renderer_accessibility.cc
===================================================================
--- content/renderer/renderer_accessibility.cc	(revision 114547)
+++ content/renderer/renderer_accessibility.cc	(working copy)
@@ -163,7 +163,8 @@
     return;
 
   gfx::Size scroll_offset = document.frame()->scrollOffset();
-  if (scroll_offset != last_scroll_offset_) {
+  if (scroll_offset != last_scroll_offset_ &&
+      notification != WebKit::WebAccessibilityNotificationLayoutComplete) {
     // Make sure the browser is always aware of the scroll position of
     // the root document element by posting a generic notification that
     // will update it.