BrowserAccessibility should own a AXPlatformNode.

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 <stdint.h>
 
 #include <map>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_split.h"
 #include "build/build_config.h"
 #include "content/browser/accessibility/ax_platform_position.h"
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/web/WebAXEnums.h"
 #include "ui/accessibility/ax_node.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/accessibility/ax_range.h"
 #include "ui/accessibility/ax_text_utils.h"
+#include "ui/accessibility/platform/ax_platform_node.h"
 #include "ui/accessibility/platform/ax_platform_node_delegate.h"
 
 // Set PLATFORM_HAS_NATIVE_ACCESSIBILITY_IMPL if this platform has
 // a platform-specific subclass of BrowserAccessibility and
 // BrowserAccessibilityManager.
 #undef PLATFORM_HAS_NATIVE_ACCESSIBILITY_IMPL
 
 #if defined(OS_WIN)
 #define PLATFORM_HAS_NATIVE_ACCESSIBILITY_IMPL 1
 #endif
@@ skipping 351 matching lines @@
 
   // The manager of this tree of accessibility objects.
   BrowserAccessibilityManager* manager_;
 
   // The underlying node.
   ui::AXNode* node_;
 
   // A unique ID, since node IDs are frame-local.
   int32_t unique_id_;
 
+  // The platform-specific object that implements the accessibility APIs for
+  // this node. Currently some of the platform-specific code is implemented by
+  // subclasses of BrowserAccessibility and some by |platform_node_|, but
+  // eventually we want all of that code to be in AXPlatformNode.  See
+  // http://crbug.com/703369
+  ui::AXPlatformNode* platform_node_;
+
  private:
   // |GetInnerText| recursively includes all the text from descendants such as
   // text found in any embedded object. In contrast, |GetText| might include a
   // special character in the place of every embedded object instead of its
   // text, depending on the platform.
   base::string16 GetInnerText() const;
 
   // If a bounding rectangle is empty, compute it based on the union of its
   // children, since most accessibility APIs don't like elements with no
   // bounds, but "virtual" elements in the accessibility tree that don't
   // correspond to a layed-out element sometimes don't have bounds.
   void FixEmptyBounds(gfx::RectF* bounds) const;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_