Blink Plugins: Remove Shadow DOM Plugin Placeholder

Source/web/PluginPlaceholderImpl.h

Index: Source/web/PluginPlaceholderImpl.h
diff --git a/Source/web/PluginPlaceholderImpl.h b/Source/web/PluginPlaceholderImpl.h
deleted file mode 100644
index f2b6b1551ed8495d868a71b6ef3b5395f1eddae1..0000000000000000000000000000000000000000
--- a/Source/web/PluginPlaceholderImpl.h
+++ /dev/null
@@ -1,59 +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 PluginPlaceholderImpl_h
-#define PluginPlaceholderImpl_h
-
-#include "core/plugins/PluginPlaceholder.h"
-#include "platform/heap/Handle.h"
-#include "platform/heap/Visitor.h"
-#include "wtf/Assertions.h"
-#include "wtf/OwnPtr.h"
-#include "wtf/PassOwnPtr.h"
-
-namespace blink {
-
-class Document;
-class PluginPlaceholderElement;
-class WebPluginPlaceholder;
-
-// Populates a plugin placeholder element with content supplied by the embedder.
-// Intended to be loaded into a user agent shadow root, but will accept any
-// container. Owns a WebPluginPlaceholder instance.
-class PluginPlaceholderImpl : public NoBaseWillBeGarbageCollectedFinalized<PluginPlaceholderImpl>, public PluginPlaceholder {
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PluginPlaceholderImpl);
-public:
-    static PassOwnPtrWillBeRawPtr<PluginPlaceholderImpl> create(PassOwnPtr<WebPluginPlaceholder> webPluginPlaceholder, Document& document)
-    {
-        ASSERT(webPluginPlaceholder);
-        return adoptPtrWillBeNoop(new PluginPlaceholderImpl(webPluginPlaceholder, document));
-    }
-
-#if ENABLE(OILPAN)
-    ~PluginPlaceholderImpl();
-#else
-    ~PluginPlaceholderImpl() override;
-#endif
-
-    DECLARE_VIRTUAL_TRACE();
-
-    // PluginPlaceholder methods
-    void loadIntoContainer(ContainerNode&) override;
-
-    // Visible for testing.
-    WebPluginPlaceholder* webPluginPlaceholder() const { return m_webPluginPlaceholder.get(); }
-
-private:
-    PluginPlaceholderImpl(PassOwnPtr<WebPluginPlaceholder>, Document&);
-
-    // Update the placeholder element with fresh content.
-    void update();
-
-    OwnPtr<WebPluginPlaceholder> m_webPluginPlaceholder;
-    RefPtrWillBeMember<PluginPlaceholderElement> m_placeholderElement;
-};
-
-} // namespace blink
-
-#endif // PluginPlaceholderImpl_h