Revert 284065 "Revert of Revert of Migrate accessibility from Re..."

trunk/src/content/browser/accessibility/browser_accessibility_manager_win.cc

Index: trunk/src/content/browser/accessibility/browser_accessibility_manager_win.cc
===================================================================
--- trunk/src/content/browser/accessibility/browser_accessibility_manager_win.cc	(revision 284469)
+++ trunk/src/content/browser/accessibility/browser_accessibility_manager_win.cc	(working copy)
@@ -55,7 +55,7 @@
     tracked_scroll_object_ = NULL;
   }
   if (accessible_hwnd_)
-    accessible_hwnd_->OnManagerDeleted(this);
+    accessible_hwnd_->OnManagerDeleted();
 }
 
 // static
@@ -75,11 +75,7 @@
 
 void BrowserAccessibilityManagerWin::SetAccessibleHWND(
     LegacyRenderWidgetHostHWND* accessible_hwnd) {
-  if (accessible_hwnd_)
-    accessible_hwnd_->OnManagerDeleted(this);
-
   accessible_hwnd_ = accessible_hwnd;
-
   if (accessible_hwnd_) {
     accessible_hwnd_->set_browser_accessibility_manager(this);
     parent_hwnd_ = accessible_hwnd_->GetParent();