Add CSS grid properties [https://www.w3.org/TR/css3-grid-layout/]

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=160164118

src/com/google/common/css/compiler/ast/Property.java

@@ -216,9 +216,29 @@ public final class Property {
         builder("font-weight"),
         builder("glyph-orientation-horizontal").isSvgOnly(),
         builder("glyph-orientation-vertical").isSvgOnly(),
+        builder("grid"),
+        builder("grid-area"),
+        builder("grid-auto-columns"),
+        builder("grid-auto-flow"),
+        builder("grid-auto-rows"),
+        builder("grid-column"),
+        builder("grid-column-end"),
+        builder("grid-column-gap"),
+        builder("grid-column-start"),
+        builder("grid-gap"),
+        builder("grid-row"),
+        builder("grid-row-end"),
+        builder("grid-row-gap"),
+        builder("grid-row-start"),
+        builder("grid-template"),
+        builder("grid-template-areas"),
+        builder("grid-template-columns"),
+        builder("grid-template-rows"),
         builder("height"),
         builder("image-rendering").isSvgOnly(),
         builder("justify-content"),
+        builder("justify-items"),
+        builder("justify-self"),
         builder("kerning").isSvgOnly(),
         builder("-khtml-user-select"),
         builder("left"),