Changed EPosition to an enum class and renamed its members

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

Index: third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
index 9e2f3a030aada2da5d47e430889f58e1c951aa21..98e2213bc0666f920aea1a4e1dd9adfefcec2341 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBlockFlow.cpp
@@ -4317,8 +4317,8 @@ void LayoutBlockFlow::positionDialog() {
   if (dialog->getCenteringMode() == HTMLDialogElement::NotCentered)
     return;
 
-  bool canCenterDialog = (style()->position() == AbsolutePosition ||
-                          style()->position() == FixedPosition) &&
+  bool canCenterDialog = (style()->position() == EPosition::kAbsolute ||
+                          style()->position() == EPosition::kFixed) &&
                          style()->hasAutoTopAndBottom();
 
   if (dialog->getCenteringMode() == HTMLDialogElement::Centered) {
@@ -4334,7 +4334,7 @@ void LayoutBlockFlow::positionDialog() {
   }
 
   FrameView* frameView = document().view();
-  LayoutUnit top = LayoutUnit((style()->position() == FixedPosition)
+  LayoutUnit top = LayoutUnit((style()->position() == EPosition::kFixed)
                                   ? 0
                                   : frameView->scrollOffsetInt().height());
   int visibleHeight = frameView->visibleContentRect(IncludeScrollbars).height();