Changed EPosition to an enum class and renamed its members

third_party/WebKit/Source/core/layout/compositing/CompositingReasonFinder.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/compositing/CompositingReasonFinder.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
@@ skipping 182 matching lines @@
 
 bool CompositingReasonFinder::requiresCompositingForTransformAnimation(
     const ComputedStyle& style) {
   return style.subtreeWillChangeContents()
              ? style.isRunningTransformAnimationOnCompositor()
              : style.hasCurrentTransformAnimation();
 }
 
 bool CompositingReasonFinder::requiresCompositingForScrollDependentPosition(
     const PaintLayer* layer) const {
-  if (layer->layoutObject()->style()->position() != FixedPosition &&
-      layer->layoutObject()->style()->position() != StickyPosition)
+  if (layer->layoutObject()->style()->position() != EPosition::kFixed &&
+      layer->layoutObject()->style()->position() != EPosition::kSticky)
     return false;
 
   if (!(m_compositingTriggers & ViewportConstrainedPositionedTrigger) &&
       (!RuntimeEnabledFeatures::compositeOpaqueFixedPositionEnabled() ||
        !layer->backgroundIsKnownToBeOpaqueInRect(
            LayoutRect(layer->boundingBoxForCompositing())) ||
        layer->compositesWithTransform() || layer->compositesWithOpacity())) {
     return false;
   }
   // Don't promote fixed position elements that are descendants of a non-view
   // container, e.g. transformed elements.  They will stay fixed wrt the
   // container rather than the enclosing frame.
   if (layer->sticksToViewport())
     return m_layoutView.frameView()->isScrollable();
-  return layer->layoutObject()->style()->position() == StickyPosition &&
+  return layer->layoutObject()->style()->position() == EPosition::kSticky &&
          layer->ancestorOverflowLayer()->scrollsOverflow();
 }
 
 }  // namespace blink