Purge the ScrollBlocksOn code.

third_party/WebKit/public/platform/WebScrollBlocksOn.h

-// 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.
-
-#ifndef WebScrollBlocksOn_h
-#define WebScrollBlocksOn_h
-
-#include "WebCommon.h"
-
-namespace blink {
-
-enum WebScrollBlocksOn {
-    WebScrollBlocksOnNone = 0x0,
-    WebScrollBlocksOnStartTouch = 0x1,
-    WebScrollBlocksOnWheelEvent = 0x2,
-    WebScrollBlocksOnScrollEvent = 0x4,
-};
-inline WebScrollBlocksOn operator| (WebScrollBlocksOn a, WebScrollBlocksOn b) { return WebScrollBlocksOn(int(a) | int(b)); }
-inline WebScrollBlocksOn& operator|= (WebScrollBlocksOn& a, WebScrollBlocksOn b) { return a = a | b; }
-inline WebScrollBlocksOn operator& (WebScrollBlocksOn a, WebScrollBlocksOn b) { return WebScrollBlocksOn(int(a) & int(b)); }
-inline WebScrollBlocksOn& operator&= (WebScrollBlocksOn& a, WebScrollBlocksOn b) { return a = a & b; }
-
-} // namespace blink
-
-#endif