Implements hanging property for text-indent from CSS3

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index 48be40d77ef6f198e166a936379bc5a36cd73052..3ae33ad72558e23781544165be3268953c0cf344 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -576,6 +576,7 @@ public:
 
     const Length& textIndent() const { return rareInheritedData->indent; }
     TextIndentLine textIndentLine() const { return static_cast<TextIndentLine>(rareInheritedData->m_textIndentLine); }
+    TextIndentType textIndentType() const { return static_cast<TextIndentType>(rareInheritedData->m_textIndentType); }
     ETextAlign textAlign() const { return static_cast<ETextAlign>(inherited_flags._text_align); }
     TextAlignLast textAlignLast() const { return static_cast<TextAlignLast>(rareInheritedData->m_textAlignLast); }
     TextJustify textJustify() const { return static_cast<TextJustify>(rareInheritedData->m_textJustify); }
@@ -1108,6 +1109,7 @@ public:
     void setColor(const Color&);
     void setTextIndent(Length v) { SET_VAR(rareInheritedData, indent, v); }
     void setTextIndentLine(TextIndentLine v) { SET_VAR(rareInheritedData, m_textIndentLine, v); }
+    void setTextIndentType(TextIndentType v) { SET_VAR(rareInheritedData, m_textIndentType, v); }
     void setTextAlign(ETextAlign v) { inherited_flags._text_align = v; }
     void setTextAlignLast(TextAlignLast v) { SET_VAR(rareInheritedData, m_textAlignLast, v); }
     void setTextJustify(TextJustify v) { SET_VAR(rareInheritedData, m_textJustify, v); }
@@ -1567,6 +1569,7 @@ public:
     static Length initialPadding() { return Length(Fixed); }
     static Length initialTextIndent() { return Length(Fixed); }
     static TextIndentLine initialTextIndentLine() { return TextIndentFirstLine; }
+    static TextIndentType initialTextIndentType() { return TextIndentNormal; }
     static EVerticalAlign initialVerticalAlign() { return BASELINE; }
     static short initialWidows() { return 2; }
     static short initialOrphans() { return 2; }