[Reland] Invalidate whitespace text on text color changes

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp

 /*
 * Copyright (C) 2008 Apple 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 596 matching lines @@
 
     if (m_layoutObject->isText()) {
         // static text beneath MenuItems and MenuButtons are just reported along with the menu item, so it's ignored on an individual level
         AXObject* parent = parentObjectUnignored();
         if (parent && (parent->ariaRoleAttribute() == MenuItemRole || parent->ariaRoleAttribute() == MenuButtonRole)) {
             if (ignoredReasons)
                 ignoredReasons->append(IgnoredReason(AXStaticTextUsedAsNameFor, parent));
             return true;
         }
         LayoutText* layoutText = toLayoutText(m_layoutObject);
-        if (!layoutText->firstTextBox()) {
+        if (!layoutText->hasTextBoxes()) {
             if (ignoredReasons)
                 ignoredReasons->append(IgnoredReason(AXEmptyText));
             return true;
         }
 
         // Don't ignore static text in editable text controls.
         for (AXObject* parent = parentObject(); parent; parent = parent->parentObject()) {
             if (parent->roleValue() == TextFieldRole)
                 return false;
         }
@@ skipping 2007 matching lines @@
         if (label && label->layoutObject()) {
             LayoutRect labelRect = axObjectCache().getOrCreate(label)->elementRect();
             result.unite(labelRect);
         }
     }
 
     return result;
 }
 
 } // namespace blink