Landing Chris Guillory CL....

chrome/browser/browser_accessibility.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_BROWSER_ACCESSIBILITY_H_
 #define CHROME_BROWSER_BROWSER_ACCESSIBILITY_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 
@@ skipping 108 matching lines @@
 
   // Modify/retrieve the state (active/inactive) of this instance.
   void set_instance_active(bool instance_active) {
     instance_active_ = instance_active;
   }
   int instance_active() const { return instance_active_; }
 
   int routing_id() const { return routing_id_; }
 
  private:
-  // Creates an empty VARIANT. Used as the equivalent of a NULL (unused) input
-  // parameter.
-  VARIANT EmptyVariant() const {
-    VARIANT empty;
-    empty.vt = VT_EMPTY;
-    return empty;
+  // Creates a VARIANT that will reference the current accessibility
+  // object, not a child accessibility object.
+  VARIANT ChildSelfVariant() const {
+    VARIANT var;
+    V_VT(&var) = VT_I4;
+    V_I4(&var) = CHILDID_SELF;
+    return var;
   }
 
   // Wrapper functions, calling through to singleton instance of
   // BrowserAccessibilityManager.
 
   // Creates an instance of BrowserAccessibility, initializes it and sets the
   // [iaccessible_id] and [parent_id].
   STDMETHODIMP CreateInstance(REFIID iid,
                               int iaccessible_id,
                               void** interface_ptr);
@@ skipping 31 matching lines @@
   // The instance should only be active if there is a non-terminated
   // RenderProcessHost associated with it. The BrowserAccessibilityManager keeps
   // track of this state, and sets it to false to disable all calls into the
   // renderer from this instance of BroweserAccessibility, and have all
   // IAccessible functions return E_FAIL.
   bool instance_active_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 #endif  // CHROME_BROWSER_BROWSER_ACCESSIBILITY_H_