Revert of Move scaling of ui resources for scrollbars to the time of upload

cc/layers/painted_scrollbar_layer.h

Index: cc/layers/painted_scrollbar_layer.h
diff --git a/cc/layers/painted_scrollbar_layer.h b/cc/layers/painted_scrollbar_layer.h
index 89133a682404c37a7d90fdf1aaefa455cb9427a6..ef0f2e87fad3ff04dcd909157a0b0dd5f143cc59 100644
--- a/cc/layers/painted_scrollbar_layer.h
+++ b/cc/layers/painted_scrollbar_layer.h
@@ -72,6 +72,9 @@
     return true;
   }
 
+  int MaxTextureSize();
+  float ClampScaleToMaxTextureSize(float scale);
+
   UIResourceBitmap RasterizeScrollbarPart(const gfx::Rect& layer_rect,
                                           const gfx::Rect& content_rect,
                                           ScrollbarPart part);