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

third_party/WebKit/Source/core/editing/EditingStyle.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 145 matching lines @@
     void replaceFontSizeByKeywordIfPossible(const ComputedStyle*, CSSComputedStyleDeclaration*);
     void extractFontSizeDelta();
     TriState triStateOfStyle(CSSStyleDeclaration* styleToCompare, ShouldIgnoreTextOnlyProperties) const;
     bool conflictsWithInlineStyleOfElement(HTMLElement*, EditingStyle* extractedStyle, Vector<CSSPropertyID>* conflictingProperties) const;
     void mergeInlineAndImplicitStyleOfElement(Element*, CSSPropertyOverrideMode, PropertiesToInclude);
     void mergeStyle(const StylePropertySet*, CSSPropertyOverrideMode);
 
     Member<MutableStylePropertySet> m_mutableStyle;
     bool m_isMonospaceFont;
     float m_fontSizeDelta;
+    bool m_isVerticalAlign;

[yosin_UTC9, 2016/05/17 01:15:48]

nit: Let's use inline initializer to avoid initializing |m_isVerticalAlign| in
each constructor.
bool m_isVerticalAlign = false;

Note: We may want to have using delegating constructor and using inline
initializer in other patches; one for delegating constructor and another for
inline initializer.

[joone, 2016/05/17 23:01:33]

Ok, I will prepare for the patches.

 
     friend class HTMLElementEquivalent;
     friend class HTMLAttributeEquivalent;
 };
 
 class StyleChange {
     DISALLOW_NEW();
 public:
     StyleChange()
         : m_applyBold(false)
@@ skipping 53 matching lines @@
     String m_applyFontSize;
 };
 
 // FIXME: Remove these functions or make them non-global to discourage using CSSStyleDeclaration directly.
 CSSValueID getIdentifierValue(CSSStyleDeclaration*, CSSPropertyID);
 CSSValueID getIdentifierValue(StylePropertySet*, CSSPropertyID);
 
 } // namespace blink
 
 #endif // EditingStyle_h