Support accessible inline text boxes.

content/browser/accessibility/browser_accessibility.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 44 matching lines @@
   // Perform platform-specific initialization. This can be called multiple times
   // during the lifetime of this instance after the members of this base object
   // have been reset with new values from the renderer process.
   // Child dependent initialization can be done here.
   virtual void PostInitialize() {}
 
   // Returns true if this is a native platform-specific object, vs a
   // cross-platform generic object.
   virtual bool IsNative() const;
 
+  // Returns true if this is a leaf node on this platform, meaning any
+  // children should not be exposed to this platform's native accessibility
+  // layer. Each platform subclass should implement this itself.
+  // The definition of a leaf may vary depending on the platform,
+  // but a leaf node should never have children that are focusable or
+  // that might send notifications.
+  virtual bool IsLeaf() const;
+
   // Initialize the tree structure of this object.
   void InitializeTreeStructure(
       BrowserAccessibilityManager* manager,
       BrowserAccessibility* parent,
       int32 renderer_id,
       int32 index_in_parent);
 
   // Initialize this object's data.
   void InitializeData(const AccessibilityNodeData& src);
 
@@ skipping 216 matching lines @@
   // immediately return failure.
   bool instance_active_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_