Rename NoEventDispatchAssertion to EventDispatchForbiddenScope and move it to platform/

Source/core/dom/NoEventDispatchAssertion.h

Index: Source/core/dom/NoEventDispatchAssertion.h
diff --git a/Source/core/dom/NoEventDispatchAssertion.h b/Source/core/dom/NoEventDispatchAssertion.h
deleted file mode 100644
index 8bf32b2c761f400650b5c9ead55eb1d1bd1e5937..0000000000000000000000000000000000000000
--- a/Source/core/dom/NoEventDispatchAssertion.h
+++ /dev/null
@@ -1,74 +0,0 @@
-// 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 NoEventDispatchAssertion_h
-#define NoEventDispatchAssertion_h
-
-#include "wtf/MainThread.h"
-#include "wtf/TemporaryChange.h"
-
-namespace blink {
-
-#if ENABLE(ASSERT)
-
-class NoEventDispatchAssertion {
-public:
-    NoEventDispatchAssertion()
-    {
-        if (!isMainThread())
-            return;
-        ++s_count;
-    }
-
-    ~NoEventDispatchAssertion()
-    {
-        if (!isMainThread())
-            return;
-        ASSERT(s_count);
-        --s_count;
-    }
-
-    static bool isEventDispatchForbidden()
-    {
-        if (!isMainThread())
-            return false;
-        return s_count;
-    }
-
-    class AllowUserAgentEvents {
-    public:
-        AllowUserAgentEvents()
-            : m_change(s_count, 0)
-        {
-        }
-
-        ~AllowUserAgentEvents()
-        {
-            ASSERT(!s_count);
-        }
-
-        TemporaryChange<unsigned> m_change;
-    };
-
-private:
-    static unsigned s_count;
-};
-
-#else
-
-class NoEventDispatchAssertion {
-public:
-    NoEventDispatchAssertion() { }
-
-    class AllowUserAgentEvents {
-    public:
-        AllowUserAgentEvents() { }
-    };
-};
-
-#endif // ENABLE(ASSERT)
-
-} // namespace blink
-
-#endif // NoEventDispatchAssertion_h