Invalidate paint of tickmarks on document change

Source/web/WebLocalFrameImpl.h

 /*
  * Copyright (C) 2009 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 306 matching lines @@
     SharedWorkerRepositoryClientImpl* sharedWorkerRepositoryClient() const { return m_sharedWorkerRepositoryClient.get(); }
 
     void setInputEventsTransformForEmulation(const IntSize&, float);
 
     static void selectWordAroundPosition(LocalFrame*, VisiblePosition);
 
     // Returns the text finder object if it already exists.
     // Otherwise creates it and then returns.
     TextFinder& ensureTextFinder();
 
-    // Invalidates vertical scrollbar only.
-    void invalidateScrollbar() const;
-
-    // Invalidates both content area and the scrollbar.
-    void invalidateAll() const;
-

[Xianzhu, 2015/04/17 18:25:03]

These were for TextFinder only. Now TextFinder uses
FrameView::invalidatePaintOfTickmarks() instead. Now the fact that we are
painting tickmarks on vertical scrollbar is contained in core)

invalidateAll() is no longer used. The logic of it is also incorrect for
slimming paint.

     // Returns a hit-tested VisiblePosition for the given point
     VisiblePosition visiblePositionForViewportPoint(const WebPoint&);
 
     void setFrameWidget(WebFrameWidgetImpl*);
     WebFrameWidgetImpl* frameWidget() const;
 
     // DevTools front-end bindings.
     void setDevToolsFrontend(WebDevToolsFrontendImpl* frontend) { m_webDevToolsFrontend = frontend; }
     WebDevToolsFrontendImpl* devToolsFrontend() { return m_webDevToolsFrontend; }
 
@@ skipping 58 matching lines @@
     GC_PLUGIN_IGNORE("340522")
     Persistent<WebLocalFrameImpl> m_selfKeepAlive;
 #endif
 };
 
 DEFINE_TYPE_CASTS(WebLocalFrameImpl, WebFrame, frame, frame->isWebLocalFrame(), frame.isWebLocalFrame());
 
 } // namespace blink
 
 #endif