Fix some minor typos related to the word "accessibility".

Source/core/accessibility/AXNodeObject.cpp

 /*
 * Copyright (C) 2012, Google Inc. All rights reserved.
 *
 * 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.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 1101 matching lines @@
     return accessibilityDescriptionForElements(elements);
 }
 
 AccessibilityRole AXNodeObject::ariaRoleAttribute() const
 {
     return m_ariaRole;
 }
 
 // When building the textUnderElement for an object, determine whether or not
 // we should include the inner text of this given descendant object or skip it.
-static bool shouldUseAccessiblityObjectInnerText(AXObject* obj)
+static bool shouldUseAccessibilityObjectInnerText(AXObject* obj)
 {
     // Consider this hypothetical example:
     // <div tabindex=0>
     //   <h2>
     //     Table of contents
     //   </h2>
     //   <a href="#start">Jump to start of book</a>
     //   <ul>
     //     <li><a href="#1">Chapter 1</a></li>
     //     <li><a href="#1">Chapter 2</a></li>
@@ skipping 21 matching lines @@
 }
 
 String AXNodeObject::textUnderElement() const
 {
     Node* node = this->node();
     if (node && node->isTextNode())
         return toText(node)->wholeText();
 
     StringBuilder builder;
     for (AXObject* child = firstChild(); child; child = child->nextSibling()) {
-        if (!shouldUseAccessiblityObjectInnerText(child))
+        if (!shouldUseAccessibilityObjectInnerText(child))
             continue;
 
         if (child->isAXNodeObject()) {
             Vector<AccessibilityText> textOrder;
             toAXNodeObject(child)->alternativeText(textOrder);
             if (textOrder.size() > 0) {
                 builder.append(textOrder[0].text);
                 continue;
             }
         }
@@ skipping 597 matching lines @@
     float range = maxValueForRange() - minValueForRange();
     float value = valueForRange();
 
     value += range * (percentChange / 100);
     setValue(String::number(value));
 
     axObjectCache()->postNotification(node(), AXObjectCacheImpl::AXValueChanged, true);
 }
 
 } // namespace blink