Revert of Implement overlay scrollbar fade out for non-composited scrollers.

third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp

Index: third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
index 9b1fb69267c52a13da0f04d73048b7b99bf13afe..b60cfbcbfbea6ef5c5a60358ba6299897314ea72 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
@@ -70,18 +70,6 @@
 
 bool ScrollbarThemeOverlay::usesOverlayScrollbars() const {
   return true;
-}
-
-double ScrollbarThemeOverlay::overlayScrollbarFadeOutDelaySeconds() const {
-  WebThemeEngine::ScrollbarStyle style;
-  Platform::current()->themeEngine()->getOverlayScrollbarStyle(&style);
-  return style.fadeOutDelaySeconds;
-}
-
-double ScrollbarThemeOverlay::overlayScrollbarFadeOutDurationSeconds() const {
-  WebThemeEngine::ScrollbarStyle style;
-  Platform::current()->themeEngine()->getOverlayScrollbarStyle(&style);
-  return style.fadeOutDurationSeconds;
 }
 
 int ScrollbarThemeOverlay::thumbPosition(const ScrollbarThemeClient& scrollbar,
@@ -163,10 +151,7 @@
   }
 
   WebThemeEngine::State state = WebThemeEngine::StateNormal;
-
-  if (!scrollbar.enabled())
-    state = WebThemeEngine::StateDisabled;
-  else if (scrollbar.pressedPart() == ThumbPart)
+  if (scrollbar.pressedPart() == ThumbPart)
     state = WebThemeEngine::StatePressed;
   else if (scrollbar.hoveredPart() == ThumbPart)
     state = WebThemeEngine::StateHover;
@@ -192,11 +177,7 @@
   if (m_allowHitTest == DisallowHitTest)
     return NoPart;
 
-  ScrollbarPart part = ScrollbarTheme::hitTest(scrollbar, position);
-  if (part != ThumbPart)
-    return NoPart;
-
-  return ThumbPart;
+  return ScrollbarTheme::hitTest(scrollbar, position);
 }
 
 ScrollbarThemeOverlay& ScrollbarThemeOverlay::mobileTheme() {