Remove WebView::setScrollbarColors

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 289 matching lines @@
     virtual WebAXObject accessibilityObject();
     virtual void applyAutofillSuggestions(
         const WebNode&,
         const WebVector<WebString>& names,
         const WebVector<WebString>& labels,
         const WebVector<WebString>& icons,
         const WebVector<int>& itemIDs,
         int separatorIndex);
     virtual void hidePopups();
     virtual void selectAutofillSuggestionAtIndex(unsigned listIndex);
-    virtual void setScrollbarColors(unsigned inactiveColor,
-                                    unsigned activeColor,
-                                    unsigned trackColor);
     virtual void setSelectionColors(unsigned activeBackgroundColor,
                                     unsigned activeForegroundColor,
                                     unsigned inactiveBackgroundColor,
                                     unsigned inactiveForegroundColor);
     virtual void performCustomContextMenuAction(unsigned action);
     virtual void showContextMenu();
     virtual void addPageOverlay(WebPageOverlay*, int /* zOrder */);
     virtual void removePageOverlay(WebPageOverlay*);
     virtual void transferActiveWheelFlingAnimation(const WebActiveWheelFlingParameters&);
     virtual void setShowPaintRects(bool);
@@ skipping 509 matching lines @@
 inline WebViewImpl* toWebViewImpl(WebView* webView)
 {
     // We have no ways to check if the specified WebView is an instance of
     // WebViewImpl because WebViewImpl is the only implementation of WebView.
     return static_cast<WebViewImpl*>(webView);
 }
 
 } // namespace WebKit
 
 #endif