Remove FrameViewBase as base class of PluginView.

third_party/WebKit/Source/core/frame/FrameOrPlugin.h

+// Copyright 2017 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 FrameOrPlugin_h
+#define FrameOrPlugin_h
+
+#include "core/CoreExport.h"
+
+namespace blink {
+
+class CullRect;
+class GraphicsContext;
+class IntRect;
+
+class CORE_EXPORT FrameOrPlugin {

[joelhockey, 2017/04/12 04:33:00]

This class is pure virtual.  I have not made it inherit from
GarbageCollectedFinalized.  Do I need to have it interacting with oilpan in some
way?

This seems most relevant in HTMLFrameOwnerElement where I hold a vector of this
class for disposing after suspend finishes.

+ public:
+  // FrameOrPlugin();
+  virtual ~FrameOrPlugin() {}
+
+  virtual void SetFrameRect(const IntRect& frameRect) = 0;
+  virtual const IntRect& FrameRect() const = 0;
+  virtual void Paint(GraphicsContext&, const CullRect&) const = 0;
+  virtual void Show() = 0;
+  virtual void Hide() = 0;
+  virtual void Dispose() = 0;
+};
+
+}  // namespace blink
+#endif  // FrameOrPlugin_h