remove duplicate friend declaration

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 526 matching lines @@
     void resizeViewWhileAnchored(FrameView*, float topControlsHeight, bool topControlsShrinkLayout);
 
     // Overrides the compositor visibility. See the description of
     // m_overrideCompositorVisibility for more details.
     void setCompositorVisibility(bool);
 
     friend class WebView;  // So WebView::Create can call our constructor
     friend class WebViewFrameWidget;
     friend class WTF::RefCounted<WebViewImpl>;
     friend void setCurrentInputEventForTest(const WebInputEvent*);
-    friend class WebViewFrameWidget;
 
     enum DragAction {
       DragEnter,
       DragOver
     };
 
     explicit WebViewImpl(WebViewClient*, WebPageVisibilityState);
     ~WebViewImpl() override;
 
     int textInputFlags();
@@ skipping 214 matching lines @@
     bool m_overrideCompositorVisibility;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif