[css-align] Adapt content-alignment properties to the new baseline syntax

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

Index: third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
index 842f8b6f81f162b12937e2ab7ca6344f2d06a6a1..d396e8d35a8db2679e1a1ae9653f6129d002b7db 100644
--- a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
@@ -3466,6 +3466,8 @@ inline ItemPosition CSSIdentifierValue::convertTo() const {
       return ItemPositionStretch;
     case CSSValueBaseline:
       return ItemPositionBaseline;
+    case CSSValueFirstBaseline:
+      return ItemPositionBaseline;
     case CSSValueLastBaseline:
       return ItemPositionLastBaseline;
     case CSSValueCenter:
@@ -3537,6 +3539,8 @@ inline ContentPosition CSSIdentifierValue::convertTo() const {
       return ContentPositionNormal;
     case CSSValueBaseline:
       return ContentPositionBaseline;
+    case CSSValueFirstBaseline:
+      return ContentPositionBaseline;
     case CSSValueLastBaseline:
       return ContentPositionLastBaseline;
     case CSSValueCenter: