Move ia2_attributes handling to AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_base.h

 // Copyright 2014 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 UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
 #define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_
 
 #include "base/macros.h"
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/platform/ax_platform_node.h"
@@ skipping 112 matching lines @@
  protected:
   AXPlatformNodeBase();
   ~AXPlatformNodeBase() override;
 
   bool IsTextOnlyObject() const;
   bool IsNativeTextControl() const;
   bool IsSimpleTextControl() const;
   bool IsRichTextControl();
   bool IsRangeValueSupported() const;
 
+  // Get the range value text, which might come from aria-valuetext or
+  // a floating-point value. This is different from the value string
+  // attribute used in input controls such as text boxes and combo boxes.
+  base::string16 GetRangeValueText();
+
   // |GetInnerText| recursively includes all the text from descendants such as
   // text found in any embedded object.
   base::string16 GetInnerText();
 
   // Cast a gfx::NativeViewAccessible to an AXPlatformNodeBase if it is one,
   // or return NULL if it's not an instance of this class.
   static AXPlatformNodeBase* FromNativeViewAccessible(
       gfx::NativeViewAccessible accessible);
 
   virtual void Dispose();
 
   // Sets the text selection in this object if possible.
   bool SetTextSelection(int start_offset, int end_offset);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AXPlatformNodeBase);
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_BASE_H_