style: Rename the PseudoId enum values to CamelCase and prefix them.

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

 /*
  * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 194 matching lines @@
     }
 }
 
 static PseudoId pseudoForScrollbarPart(ScrollbarPart part)
 {
     switch (part) {
     case BackButtonStartPart:
     case ForwardButtonStartPart:
     case BackButtonEndPart:
     case ForwardButtonEndPart:
-        return SCROLLBAR_BUTTON;
+        return PseudoIdScrollbarButton;
     case BackTrackPart:
     case ForwardTrackPart:
-        return SCROLLBAR_TRACK_PIECE;
+        return PseudoIdScrollbarTrackPiece;
     case ThumbPart:
-        return SCROLLBAR_THUMB;
+        return PseudoIdScrollbarThumb;
     case TrackBGPart:
-        return SCROLLBAR_TRACK;
+        return PseudoIdScrollbarTrack;
     case ScrollbarBGPart:
-        return SCROLLBAR;
+        return PseudoIdScrollbar;
     case NoPart:
     case AllParts:
         break;
     }
     ASSERT_NOT_REACHED();
-    return SCROLLBAR;
+    return PseudoIdScrollbar;
 }
 
 void LayoutScrollbar::updateScrollbarPart(ScrollbarPart partType, bool destroy)
 {
     if (partType == NoPart)
         return;
 
     RefPtr<ComputedStyle> partStyle = !destroy ? getScrollbarPseudoStyle(partType,  pseudoForScrollbarPart(partType)) : PassRefPtr<ComputedStyle>(nullptr);
 
     bool needLayoutObject = !destroy && partStyle && partStyle->display() != NONE;
@@ skipping 120 matching lines @@
     return orientation() == HorizontalScrollbar ? partLayoutObject->size().width() : partLayoutObject->size().height();
 }
 
 void LayoutScrollbar::invalidateDisplayItemClientsOfScrollbarParts(const LayoutBoxModelObject& paintInvalidationContainer)
 {
     for (auto& part : m_parts)
         part.value->invalidateDisplayItemClientsIncludingNonCompositingDescendants(&paintInvalidationContainer, PaintInvalidationScroll);
 }
 
 } // namespace blink