Remove most of Widget (FrameViewBase) class from HTMLPlugInElement.

third_party/WebKit/Source/web/LocalFrameClientImpl.h

Index: third_party/WebKit/Source/web/LocalFrameClientImpl.h
diff --git a/third_party/WebKit/Source/web/LocalFrameClientImpl.h b/third_party/WebKit/Source/web/LocalFrameClientImpl.h
index 3bddd09785c363a88b24c0bdea888c536c31d8b4..7c317de2c1d4045ca6c4a6b23347825615be041d 100644
--- a/third_party/WebKit/Source/web/LocalFrameClientImpl.h
+++ b/third_party/WebKit/Source/web/LocalFrameClientImpl.h
@@ -147,13 +147,13 @@ class LocalFrameClientImpl final : public LocalFrameClient {
                           const WTF::AtomicString& name,
                           HTMLFrameOwnerElement*) override;
   virtual bool canCreatePluginWithoutRenderer(const String& mimeType) const;
-  FrameViewBase* createPlugin(HTMLPlugInElement*,
-                              const KURL&,
-                              const Vector<WTF::String>&,
-                              const Vector<WTF::String>&,
-                              const WTF::String&,
-                              bool loadManually,
-                              DetachedPluginPolicy) override;
+  PluginView* createPlugin(HTMLPlugInElement*,
+                           const KURL&,
+                           const Vector<WTF::String>&,
+                           const Vector<WTF::String>&,
+                           const WTF::String&,
+                           bool loadManually,
+                           DetachedPluginPolicy) override;
   std::unique_ptr<WebMediaPlayer> createWebMediaPlayer(
       HTMLMediaElement&,
       const WebMediaPlayerSource&,