Revert of isActiveFocus() is a more meaningful name

Source/web/ScrollbarGroup.cpp

 /*
  * Copyright (C) 2011 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 102 matching lines @@
     if (m_horizontalScrollbar && scrollbar == m_horizontalScrollbar->scrollbar())
         m_horizontalScrollbar->invalidateScrollbarRect(rect);
     else if (m_verticalScrollbar && scrollbar == m_verticalScrollbar->scrollbar())
         m_verticalScrollbar->invalidateScrollbarRect(rect);
 }
 
 void ScrollbarGroup::invalidateScrollCornerRect(const IntRect&)
 {
 }
 
-bool ScrollbarGroup::isActiveFocus() const
+bool ScrollbarGroup::isActive() const
 {
     return true;
 }
 
 void ScrollbarGroup::setFrameRect(const IntRect& frameRect)
 {
     m_frameRect = frameRect;
 }
 
 IntRect ScrollbarGroup::scrollableAreaBoundingBox() const
@@ skipping 143 matching lines @@
     }
 
     int pageStep = std::max(
         static_cast<int>(static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging()),
         length - ScrollableArea::maxOverlapBetweenPages());
 
     return std::max(pageStep, 1);
 }
 
 } // namespace blink