Remove FrameViewBase as base class of PluginView.

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

Index: third_party/WebKit/Source/core/frame/RemoteFrameView.h
diff --git a/third_party/WebKit/Source/core/frame/RemoteFrameView.h b/third_party/WebKit/Source/core/frame/RemoteFrameView.h
index 3a1f93d5d18debe5d46bcccdd143ac20389d5cbe..886ec9a3d63e85ca2d5dee5f8dcd5e6df63e1fa9 100644
--- a/third_party/WebKit/Source/core/frame/RemoteFrameView.h
+++ b/third_party/WebKit/Source/core/frame/RemoteFrameView.h
@@ -5,15 +5,20 @@
 #ifndef RemoteFrameView_h
 #define RemoteFrameView_h
 
+#include "core/frame/FrameOrPlugin.h"
 #include "platform/FrameViewBase.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
+class CullRect;
+class GraphicsContext;
 class RemoteFrame;
 
-class RemoteFrameView final : public FrameViewBase {
+class RemoteFrameView final : public FrameViewBase, public FrameOrPlugin {
+  USING_GARBAGE_COLLECTED_MIXIN(RemoteFrameView);
+
  public:
   static RemoteFrameView* Create(RemoteFrame*);
 
@@ -30,8 +35,12 @@ class RemoteFrameView final : public FrameViewBase {
   void Dispose() override;
   // Override to notify remote frame that its viewport size has changed.
   void FrameRectsChanged() override;
-  void InvalidateRect(const IntRect&) override;
+  void InvalidateRect(const IntRect&);
   void SetFrameRect(const IntRect&) override;
+  const IntRect& FrameRect() const override {
+    return FrameViewBase::FrameRect();
+  }
+  void Paint(GraphicsContext&, const CullRect&) const override {}
   void Hide() override;
   void Show() override;
   void SetParentVisible(bool) override;