Remove FrameViewBase as base class of PluginView.

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

Index: third_party/WebKit/Source/core/frame/FrameOrPlugin.h
diff --git a/third_party/WebKit/Source/core/frame/FrameOrPlugin.h b/third_party/WebKit/Source/core/frame/FrameOrPlugin.h
new file mode 100644
index 0000000000000000000000000000000000000000..426cd53e600e9365ed8ca252ea9521eedc029ce3
--- /dev/null
+++ b/third_party/WebKit/Source/core/frame/FrameOrPlugin.h
@@ -0,0 +1,32 @@
+// 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"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class CullRect;
+class GraphicsContext;
+class IntRect;
+
+// FrameOrPlugin is a pure virtual class which is implemented by FrameView,
+// RemoteFrameView, and PluginView.
+class CORE_EXPORT FrameOrPlugin : public GarbageCollectedMixin {
+ public:
+  virtual ~FrameOrPlugin() {}
+
+  virtual void SetFrameRect(const IntRect&) = 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