Implements CSSPropertyAPI for the tab-size property.

third_party/WebKit/Source/core/css/CSSProperties.in

Index: third_party/WebKit/Source/core/css/CSSProperties.in
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.in b/third_party/WebKit/Source/core/css/CSSProperties.in
index bf6cf0f65b1ca1d91b4ba50a03bd150a9ae7c626..60b41004360a25824cd02106e68d095326719ead 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.in
+++ b/third_party/WebKit/Source/core/css/CSSProperties.in
@@ -372,8 +372,8 @@ stroke-miterlimit interpolable, inherited, svg, type_name=float, name_for_method
 stroke-opacity interpolable, inherited, svg, converter=convertNumberOrPercentage
 stroke-width interpolable, inherited, svg, converter=convertUnzoomedLength
 table-layout
-tab-size inherited, converter=convertLengthOrTabSpaces, type_name=TabSize
-text-align inherited, custom_value, keyword_only, keywords=[left|right|center|justify|-webkit-left|-webkit-right|-webkit-center|start|end], initial_keyword=start
+tab-size inherited, converter=convertLengthOrTabSpaces, type_name=TabSize, api_class
+text-align inherited, custom_value, keyword_only, keywords=[left|right|center|justify|webkitLeft|webkitRight|webkitCenter|start|end], initial_keyword=start
 text-align-last inherited, type_name=TextAlignLast
 text-anchor inherited, svg
 text-combine-upright inherited, type_name=TextCombine, name_for_methods=TextCombine