Revert of Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node.h

Index: ui/accessibility/platform/ax_platform_node.h
diff --git a/ui/accessibility/platform/ax_platform_node.h b/ui/accessibility/platform/ax_platform_node.h
index 8fa4286afaab26ff157a6e89e3eeb6bc3c12ada2..10ecba2064d0d76b9243d7a590ea98dbc969411b 100644
--- a/ui/accessibility/platform/ax_platform_node.h
+++ b/ui/accessibility/platform/ax_platform_node.h
@@ -5,7 +5,6 @@
 #ifndef UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_H_
 #define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_H_
 
-#include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_export.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -13,37 +12,16 @@
 
 class AXPlatformNodeDelegate;
 
-// AXPlatformNode is the abstract base class for an implementation of
-// native accessibility APIs on supported platforms (e.g. Windows, Mac OS X).
-// An object that wants to be accessible can derive from AXPlatformNodeDelegate
-// and then call AXPlatformNode::Create. The delegate implementation should
-// own the AXPlatformNode instance (or otherwise manage its lifecycle).
 class AX_EXPORT AXPlatformNode {
  public:
-  // Create an appropriate platform-specific instance. The delegate owns the
-  // AXPlatformNode instance (or manages its lifecycle in some other way).
+  // Create a platform appropriate instance.
   static AXPlatformNode* Create(AXPlatformNodeDelegate* delegate);
-
-  // Cast a gfx::NativeViewAccessible to an AXPlatformNode if it is one,
-  // or return NULL if it's not an instance of this class.
-  static AXPlatformNode* FromNativeViewAccessible(
-      gfx::NativeViewAccessible accessible);
 
   // Call Destroy rather than deleting this, because the subclass may
   // use reference counting.
   virtual void Destroy() = 0;
 
-  // Get the platform-specific accessible object type for this instance.
-  // On some platforms this is just a type cast, on others it may be a
-  // wrapper object or handle.
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
-
-  // Fire a platform-specific notification that an event has occurred on
-  // this object.
-  virtual void NotifyAccessibilityEvent(ui::AXEvent event_type) = 0;
-
-  // Return this object's delegate.
-  virtual AXPlatformNodeDelegate* GetDelegate() const = 0;
 
  protected:
   AXPlatformNode();