Make ETextSecurity an enum class.

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
index 503fd0b6246f0f7ff909d4accb82335bf27d951f..d9153a1b686a336501e0c9955157ad3574be472d 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
@@ -964,15 +964,15 @@ String AXLayoutObject::GetText() const {
 
     UChar mask_character = 0;
     switch (style->TextSecurity()) {
-      case TSNONE:
+      case ETextSecurity::kNone:
         break;  // Fall through to the non-password branch.
-      case TSDISC:
+      case ETextSecurity::kDisc:
         mask_character = kBulletCharacter;
         break;
-      case TSCIRCLE:
+      case ETextSecurity::kCircle:
         mask_character = kWhiteBulletCharacter;
         break;
-      case TSSQUARE:
+      case ETextSecurity::kSquare:
         mask_character = kBlackSquareCharacter;
         break;
     }