Apply vertical-align style of <sub> and <sup> to child elements.

third_party/WebKit/Source/core/editing/Editor.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 623 matching lines @@
 void Editor::applyParagraphStyleToSelection(StylePropertySet* style, EditAction editingAction)
 {
     if (!style || style->isEmpty() || !canEditRichly())
         return;
 
     applyParagraphStyle(style, editingAction);
 }
 
 bool Editor::selectionStartHasStyle(CSSPropertyID propertyID, const String& value) const
 {
-    return EditingStyle::create(propertyID, value)->triStateOfStyle(
-        EditingStyle::styleAtSelectionStart(frame().selection().selection(), propertyID == CSSPropertyBackgroundColor));
+    EditingStyle* styleToCheck = EditingStyle::create(propertyID, value);
+    EditingStyle* styleAtStart = EditingStyle::styleAtSelectionStart(frame().selection().selection(),
+        propertyID == CSSPropertyBackgroundColor, styleToCheck->style());
+    return styleToCheck->triStateOfStyle(styleAtStart);
 }
 
 TriState Editor::selectionHasStyle(CSSPropertyID propertyID, const String& value) const
 {
     return EditingStyle::create(propertyID, value)->triStateOfStyle(frame().selection().selection());
 }
 
 String Editor::selectionStartCSSPropertyValue(CSSPropertyID propertyID)
 {
     EditingStyle* selectionStyle = EditingStyle::styleAtSelectionStart(frame().selection().selection(),
@@ skipping 711 matching lines @@
 }
 
 DEFINE_TRACE(Editor)
 {
     visitor->trace(m_frame);
     visitor->trace(m_lastEditCommand);
     visitor->trace(m_mark);
 }
 
 } // namespace blink