Add DCHECK to BrowserAccessibilityManager::Remove to detect undefined behavoir that may lead to a...

content/browser/accessibility/browser_accessibility_manager.cc

Index: content/browser/accessibility/browser_accessibility_manager.cc
===================================================================
--- content/browser/accessibility/browser_accessibility_manager.cc	(revision 97086)
+++ content/browser/accessibility/browser_accessibility_manager.cc	(working copy)
@@ -116,6 +116,9 @@
 
 void BrowserAccessibilityManager::Remove(int32 child_id, int32 renderer_id) {
   child_id_map_.erase(child_id);
+
+  // TODO(ctguil): Investigate if hit. We should never have a newer entry.
+  DCHECK(renderer_id_to_child_id_map_[renderer_id] == child_id);
   // Make sure we don't overwrite a newer entry (see UpdateNode for a possible
   // corner case).
   if (renderer_id_to_child_id_map_[renderer_id] == child_id)