Revert of Expose scroll customization for touch to JS (behind REF).

Source/core/page/scrolling/ScrollCustomizationCallbacks.cpp

Index: Source/core/page/scrolling/ScrollCustomizationCallbacks.cpp
diff --git a/Source/core/page/scrolling/ScrollCustomizationCallbacks.cpp b/Source/core/page/scrolling/ScrollCustomizationCallbacks.cpp
deleted file mode 100644
index cd9d41fc80fa5876b92ca6343dd8b973ed132180..0000000000000000000000000000000000000000
--- a/Source/core/page/scrolling/ScrollCustomizationCallbacks.cpp
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2015 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 "config.h"
-#include "core/page/scrolling/ScrollCustomizationCallbacks.h"
-
-#include "core/page/scrolling/ScrollStateCallback.h"
-
-namespace blink {
-
-void ScrollCustomizationCallbacks::setDistributeScroll(Element* element, ScrollStateCallback* scrollStateCallback)
-{
-    m_distributeScrollCallbacks.set(element, scrollStateCallback);
-}
-
-ScrollStateCallback* ScrollCustomizationCallbacks::getDistributeScroll(Element* element)
-{
-    auto it = m_distributeScrollCallbacks.find(element);
-    if (it == m_distributeScrollCallbacks.end())
-        return nullptr;
-    return it->value.get();
-}
-
-void ScrollCustomizationCallbacks::setApplyScroll(Element* element, ScrollStateCallback* scrollStateCallback)
-{
-    m_applyScrollCallbacks.set(element, scrollStateCallback);
-}
-
-ScrollStateCallback* ScrollCustomizationCallbacks::getApplyScroll(Element* element)
-{
-    auto it = m_applyScrollCallbacks.find(element);
-    if (it == m_applyScrollCallbacks.end())
-        return nullptr;
-    return it->value.get();
-}
-
-#if !ENABLE(OILPAN)
-void ScrollCustomizationCallbacks::removeCallbacksForElement(Element* element)
-{
-    m_applyScrollCallbacks.remove(element);
-    m_distributeScrollCallbacks.remove(element);
-}
-#endif
-
-} // namespace blink