Changed EPosition to an enum class and renamed its members

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

Index: third_party/WebKit/Source/core/layout/PaintInvalidationState.cpp
diff --git a/third_party/WebKit/Source/core/layout/PaintInvalidationState.cpp b/third_party/WebKit/Source/core/layout/PaintInvalidationState.cpp
index 6ba4b70bf1d7789ab23e74629e59e1d1209df7a3..a1a395249ffb86affc62651aae984b2faebcf49c 100644
--- a/third_party/WebKit/Source/core/layout/PaintInvalidationState.cpp
+++ b/third_party/WebKit/Source/core/layout/PaintInvalidationState.cpp
@@ -251,7 +251,7 @@ void PaintInvalidationState::updateForCurrentObject(
 
   EPosition position = m_currentObject.styleRef().position();
 
-  if (position == FixedPosition) {
+  if (position == EPosition::kFixed) {
     // Use slow path to get the offset of the fixed-position, and enable fast
     // path for descendants.
     FloatPoint fixedOffset = m_currentObject.localToAncestorPoint(
@@ -275,7 +275,7 @@ void PaintInvalidationState::updateForCurrentObject(
     return;
   }
 
-  if (position == AbsolutePosition) {
+  if (position == EPosition::kAbsolute) {
     m_cachedOffsetsEnabled = m_cachedOffsetsForAbsolutePositionEnabled;
     if (!m_cachedOffsetsEnabled)
       return;