Change computed style enums to be prefixed with 'k'.

third_party/WebKit/Source/core/layout/LayoutThemeMac.mm

Index: third_party/WebKit/Source/core/layout/LayoutThemeMac.mm
diff --git a/third_party/WebKit/Source/core/layout/LayoutThemeMac.mm b/third_party/WebKit/Source/core/layout/LayoutThemeMac.mm
index 909ecb8326d94b92932646d76b41930fc5dfd907..a0dec32d91586f2c92afacbb5c50d3b30f8354da 100644
--- a/third_party/WebKit/Source/core/layout/LayoutThemeMac.mm
+++ b/third_party/WebKit/Source/core/layout/LayoutThemeMac.mm
@@ -485,7 +485,7 @@ bool LayoutThemeMac::isControlStyled(const ComputedStyle& style) const {
       return true;
     // NSPopUpButtonCell on macOS 10.9 doesn't support
     // NSUserInterfaceLayoutDirectionRightToLeft.
-    if (IsOS10_9() && style.direction() == TextDirection::Rtl)
+    if (IsOS10_9() && style.direction() == TextDirection::kRtl)
       return true;
   }
   // Some other cells don't work well when scaled.
@@ -718,7 +718,7 @@ void LayoutThemeMac::adjustMenuListStyle(ComputedStyle& style,
   style.setHeight(Length(Auto));
 
   // White-space is locked to pre.
-  style.setWhiteSpace(EWhiteSpace::Pre);
+  style.setWhiteSpace(EWhiteSpace::kPre);
 
   // Set the foreground color to black or gray when we have the aqua look.
   // Cast to RGB32 is to work around a compiler bug.
@@ -820,7 +820,7 @@ void LayoutThemeMac::setPopupButtonCellState(const LayoutObject& object,
   updatePressedState(popupButton, object);
 
   popupButton.userInterfaceLayoutDirection =
-      object.styleRef().direction() == TextDirection::Ltr
+      object.styleRef().direction() == TextDirection::kLtr
           ? NSUserInterfaceLayoutDirectionLeftToRight
           : NSUserInterfaceLayoutDirectionRightToLeft;
 }