Implements hanging property for text-indent from CSS3

Source/core/rendering/line/BreakingContextInlineHeaders.h

Index: Source/core/rendering/line/BreakingContextInlineHeaders.h
diff --git a/Source/core/rendering/line/BreakingContextInlineHeaders.h b/Source/core/rendering/line/BreakingContextInlineHeaders.h
index c808288202f8c0228704ef875cda4116e7937d4e..9bb119eeaa1ca8c78b8a3728fc8111555ae44621 100644
--- a/Source/core/rendering/line/BreakingContextInlineHeaders.h
+++ b/Source/core/rendering/line/BreakingContextInlineHeaders.h
@@ -898,12 +898,14 @@ inline void BreakingContext::commitAndUpdateLineBreakIfNeeded()
 
 inline IndentTextOrNot requiresIndent(bool isFirstLine, bool isAfterHardLineBreak, RenderStyle* style)
 {
-    if (isFirstLine)
-        return IndentText;
-    if (isAfterHardLineBreak && style->textIndentLine() == TextIndentEachLine)
-        return IndentText;
+    IndentTextOrNot shouldIndentText = DoNotIndentText;
+    if (isFirstLine || (isAfterHardLineBreak && style->textIndentLine()) == TextIndentEachLine)
+        shouldIndentText = IndentText;
 
-    return DoNotIndentText;
+    if (style->textIndentType() == TextIndentHanging)
+        shouldIndentText = shouldIndentText == IndentText ? DoNotIndentText : IndentText;
+
+    return shouldIndentText;
 }
 
 }