Add an accessibility setting to expose password values.

Source/core/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 335 matching lines @@
     virtual bool isMenuButton() const { return false; }
     virtual bool isMenuList() const { return false; }
     virtual bool isMenuListOption() const { return false; }
     virtual bool isMenuListPopup() const { return false; }
     bool isMenuRelated() const;
     virtual bool isMockObject() const { return false; }
     virtual bool isNativeSpinButton() const { return false; }
     virtual bool isNativeTextControl() const { return false; } // input or textarea
     virtual bool isNonNativeTextControl() const { return false; } // contenteditable or role=textbox
     virtual bool isPasswordField() const { return false; }
+    virtual bool isPasswordFieldAndShouldHideValue() const;
     virtual bool isProgressIndicator() const { return false; }
     bool isRadioButton() const { return roleValue() == RadioButtonRole; }
     bool isScrollbar() const { return roleValue() == ScrollBarRole; }
     virtual bool isSlider() const { return false; }
     virtual bool isSpinButton() const { return roleValue() == SpinButtonRole; }
     virtual bool isSpinButtonPart() const { return false; }
     bool isTabItem() const { return roleValue() == TabRole; }
     virtual bool isTableCell() const { return false; }
     virtual bool isTableRow() const { return false; }
     virtual bool isTableCol() const { return false; }
@@ skipping 244 matching lines @@
     // functions called here may only search up the tree (ancestors), not down.
     void updateCachedAttributeValuesIfNeeded() const;
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate) \
     DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, object.predicate)
 
 } // namespace blink
 
 #endif // AXObject_h