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diff --git a/Source/WebKit/chromium/public/WebScopedMicrotaskSuppression.h b/Source/WebKit/chromium/public/WebScopedMicrotaskSuppression.h
deleted file mode 100644
index 826db6955..000000000
--- a/Source/WebKit/chromium/public/WebScopedMicrotaskSuppression.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright (C) 2012 Google 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef WebScopedMicrotaskSuppression_h
-#define WebScopedMicrotaskSuppression_h
-
-#include "platform/WebPrivateOwnPtr.h"
-
-namespace WebKit {
-
-// This class wraps V8RecursionScope::BypassMicrotaskCheckpoint. Please
-// see V8RecursionScope.h for full usage. Short story: Embedder calls into
-// script contexts which also host page script must do one of two things:
-//
-//   1. If the call may cause any page/author script to run, it must be
-//      captured for pre/post work (e.g. inspector instrumentation/microtask
-//      delivery) and thus be invoked through WebFrame (e.g. executeScript*,
-//      callFunction*).
-//   2. If the call will not cause any page/author script to run, the call
-//      should be made directly via the v8 context, but the callsite must be
-//      accompanied by a stack allocated WebScopedMicrotaskSuppression, e.g.:
-//
-//        ...
-//        {
-//            WebKit::WebScopedMicrotaskSuppression suppression;
-//            func->Call(global, argv, args);
-//        }
-//        ...
-//
-class WebScopedMicrotaskSuppression {
-public:
-    WebScopedMicrotaskSuppression() { initialize(); }
-    ~WebScopedMicrotaskSuppression() { reset(); }
-
-private:
-    WEBKIT_EXPORT void initialize();
-    WEBKIT_EXPORT void reset();
-
-#ifndef NDEBUG
-    class Impl;
-    WebPrivateOwnPtr<Impl> m_impl;
-#endif
-};
-
-} // WebKit
-
-#endif