Generate enum/getters/setters/mappings for text-security.

Currently, the text-security property is a 'storage_only' field,
so it has no generated public getters/setters. This patch changes it to
a 'keyword' field so that its getters/setters can be generated as well.
We also generate the EWordBreak enum and use the generated
CSSValueID <-> EWordBreak mappings.

Diff of generated files:
https://gist.github.com/darrnshn/2811407420cd06be91eca37e52c974d6/revisions

BUG=628043

Review-Url: https://codereview.chromium.org/2911583002
Cr-Commit-Position: refs/heads/master@{#474901}

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

@@ -1275,44 +1275,6 @@ inline TextDecorationSkip CSSIdentifierValue::ConvertTo() const {
   return TextDecorationSkip::kObjects;
 }
 
-template <>
-inline CSSIdentifierValue::CSSIdentifierValue(ETextSecurity e)
-    : CSSValue(kIdentifierClass) {
-  switch (e) {
-    case ETextSecurity::kNone:
-      value_id_ = CSSValueNone;
-      break;
-    case ETextSecurity::kDisc:
-      value_id_ = CSSValueDisc;
-      break;
-    case ETextSecurity::kCircle:
-      value_id_ = CSSValueCircle;
-      break;
-    case ETextSecurity::kSquare:
-      value_id_ = CSSValueSquare;
-      break;
-  }
-}
-
-template <>
-inline ETextSecurity CSSIdentifierValue::ConvertTo() const {
-  switch (value_id_) {
-    case CSSValueNone:
-      return ETextSecurity::kNone;
-    case CSSValueDisc:
-      return ETextSecurity::kDisc;
-    case CSSValueCircle:
-      return ETextSecurity::kCircle;
-    case CSSValueSquare:
-      return ETextSecurity::kSquare;
-    default:
-      break;
-  }
-
-  NOTREACHED();
-  return ETextSecurity::kNone;
-}
-
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EUserDrag e)
     : CSSValue(kIdentifierClass) {

third_party/WebKit/Source/core/css/CSSProperties.json5

@@ -2597,10 +2597,9 @@
     {
       name: "-webkit-text-security",
       inherited: true,
-      field_template: "storage_only",
-      type_name: "ETextSecurity",
-      default_value: "ETextSecurity::kNone",
-      field_size: 2,
+      field_template: "keyword",
+      keywords: ["none", "disc", "circle", "square"],
+      default_value: "none",
       field_group: "rare-inherited",
     },
     {

third_party/WebKit/Source/core/style/ComputedStyleConstants.h

@@ -173,8 +173,6 @@ enum EFlexDirection {
 };
 enum EFlexWrap { kFlexNoWrap, kFlexWrap, kFlexWrapReverse };
 
-enum class ETextSecurity { kNone, kDisc, kCircle, kSquare };
-
 // CSS3 User Modify Properties
 
 enum class EUserModify { kReadOnly, kReadWrite, kReadWritePlaintextOnly };