Blink Plugins: Remove Shadow DOM Plugin Placeholder

Source/core/html/shadow/PluginPlaceholderElement.cpp

-// 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.
-
-#include "config.h"
-#include "core/html/shadow/PluginPlaceholderElement.h"
-
-#include "bindings/core/v8/V8PluginPlaceholderElement.h"
-#include "core/dom/Document.h"
-#include "wtf/Assertions.h"
-
-namespace blink {
-
-PluginPlaceholderElement::PluginPlaceholderElement(Document& document)
-    : HTMLDivElement(document)
-{
-}
-
-PassRefPtrWillBeRawPtr<PluginPlaceholderElement> PluginPlaceholderElement::create(Document& document)
-{
-    RefPtrWillBeRawPtr<PluginPlaceholderElement> element = adoptRefWillBeNoop(new PluginPlaceholderElement(document));
-    bool success = V8PluginPlaceholderElement::PrivateScript::createdCallbackMethod(document.frame(), element.get());
-    ASSERT_UNUSED(success, success);
-    return element.release();
-}
-
-void PluginPlaceholderElement::setMessage(const String& message)
-{
-    bool success = V8PluginPlaceholderElement::PrivateScript::messageAttributeSetter(document().frame(), this, message);
-    ASSERT_UNUSED(success, success);
-}
-
-void PluginPlaceholderElement::setIsCloseable(bool closeable)
-{
-    bool success = V8PluginPlaceholderElement::PrivateScript::closeableAttributeSetter(document().frame(), this, closeable);
-    ASSERT_UNUSED(success, success);
-}
-
-} // namespace blink