cc: Added raster source.

cc/resources/picture_pile.h

Index: cc/resources/picture_pile.h
diff --git a/cc/resources/picture_pile.h b/cc/resources/picture_pile.h
index 595ded4a4e5d176733ff1f07352630efb8cd49e1..b47099d1ad65287497c285a9b9a3d044b10b5880 100644
--- a/cc/resources/picture_pile.h
+++ b/cc/resources/picture_pile.h
@@ -5,6 +5,7 @@
 #ifndef CC_RESOURCES_PICTURE_PILE_H_
 #define CC_RESOURCES_PICTURE_PILE_H_
 
+#include "base/memory/ref_counted.h"
 #include "cc/resources/picture_pile_base.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ -16,6 +17,7 @@ class RenderingStatsInstrumentation;
 class CC_EXPORT PicturePile : public PicturePileBase {
  public:
   PicturePile();
+  virtual ~PicturePile() override;
 
   // Re-record parts of the picture that are invalid.
   // Invalidations are in layer space, and will be expanded to cover everything
@@ -53,9 +55,6 @@ class CC_EXPORT PicturePile : public PicturePileBase {
 
   void SetPixelRecordDistanceForTesting(int d) { pixel_record_distance_ = d; }
 
- protected:
-  ~PicturePile() override;
-
  private:
   friend class PicturePileImpl;