Refactor DrawingRecorders to check for cached drawings earlier

Source/platform/scroll/ScrollbarThemeMacNonOverlayAPI.mm

 /*
  * Copyright (C) 2013 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 61 matching lines @@
     }
 }
 
 // Override ScrollbarThemeMacCommon::paint() to add support for the following:
 //     - drawing using WebThemeEngine functions
 //     - drawing tickmarks
 //     - Skia specific changes
 bool ScrollbarThemeMacNonOverlayAPI::paint(ScrollbarThemeClient* scrollbar, GraphicsContext* context, const IntRect& damageRect)
 {
     DisplayItem::Type displayItemType = scrollbar->orientation() == HorizontalScrollbar ? DisplayItem::ScrollbarHorizontal : DisplayItem::ScrollbarVertical;
+    if (DrawingRecorder::useCachedDrawingIfPossible(*context, *scrollbar, displayItemType))
+        return true;
+
     DrawingRecorder recorder(*context, *scrollbar, displayItemType, scrollbar->frameRect());
-    if (recorder.canUseCachedDrawing())
-        return true;
 
     // Get the tickmarks for the frameview.
     Vector<IntRect> tickmarks;
     scrollbar->getTickmarks(tickmarks);
 
     HIThemeTrackDrawInfo trackInfo;
     trackInfo.version = 0;
     trackInfo.kind = scrollbar->controlSize() == RegularScrollbar ? kThemeMediumScrollBar : kThemeSmallScrollBar;
     trackInfo.bounds = scrollbar->frameRect();
     trackInfo.min = 0;
@@ skipping 222 matching lines @@
         return IntRect(scrollbar->x() + startWidth, scrollbar->y(), scrollbar->width() - totalWidth, thickness);
     return IntRect(scrollbar->x(), scrollbar->y() + startWidth, thickness, scrollbar->height() - totalWidth);
 }
 
 int ScrollbarThemeMacNonOverlayAPI::minimumThumbLength(ScrollbarThemeClient* scrollbar)
 {
     return cThumbMinLength[scrollbar->controlSize()];
 }
 
 }