Adds class, id and src attributes to object attributes of IA2.

content/browser/accessibility/browser_accessibility_win.h

Index: content/browser/accessibility/browser_accessibility_win.h
diff --git a/content/browser/accessibility/browser_accessibility_win.h b/content/browser/accessibility/browser_accessibility_win.h
index 0cb77443adc93394de75e2c220ff535db16b06f6..8d2971b5b3add3db6c250ac71ac46d05b7f6e1fd 100644
--- a/content/browser/accessibility/browser_accessibility_win.h
+++ b/content/browser/accessibility/browser_accessibility_win.h
@@ -848,6 +848,9 @@ BrowserAccessibilityWin
   // or a menu list option with a parent of type menu list popup.
   bool IsListBoxOptionOrMenuListOption();
 
+  // Updates object attributes of IA2 with html attributes.
+  void UpdateRequiredAttributes();
+
   // Windows-specific unique ID (unique within the browser process),
   // used for get_accChild, NotifyWinEvent, and as the unique ID for
   // IAccessible2 and ISimpleDOM.