Changed EDisplay to an enum class and renamed its members to be keywords

third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp

Index: third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp b/third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp
index 1bb828a6dab8639fef3b0a153d7c157a296892fb..eab29d2517cff54d22290c8f26c3f6c59e598242 100644
--- a/third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp
@@ -238,9 +238,9 @@ void LayoutScrollbar::updateScrollbarPart(ScrollbarPart partType, bool destroy)
 
     RefPtr<ComputedStyle> partStyle = !destroy ? getScrollbarPseudoStyle(partType,  pseudoForScrollbarPart(partType)) : PassRefPtr<ComputedStyle>(nullptr);
 
-    bool needLayoutObject = !destroy && partStyle && partStyle->display() != NONE;
+    bool needLayoutObject = !destroy && partStyle && partStyle->display() != EDisplay::None;
 
-    if (needLayoutObject && partStyle->display() != BLOCK) {
+    if (needLayoutObject && partStyle->display() != EDisplay::Block) {
         // See if we are a button that should not be visible according to OS settings.
         WebScrollbarButtonsPlacement buttonsPlacement = theme().buttonsPlacement();
         switch (partType) {