cc: Move DisplayItem::Raster up to DisplayItemList

cc/playback/display_item.h

Index: cc/playback/display_item.h
diff --git a/cc/playback/display_item.h b/cc/playback/display_item.h
index 09899a80c3eccc5b97d68b48f3245fa25d8a09b2..8e56d21cdbf6403db820987901df617d42b526a4 100644
--- a/cc/playback/display_item.h
+++ b/cc/playback/display_item.h
@@ -14,12 +14,12 @@
 #include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/geometry/rect.h"
 
-class SkCanvas;
-
 namespace cc {
 
 class CC_EXPORT DisplayItem {
  public:
+  virtual ~DisplayItem() = default;
+
   enum Type {
     CLIP,
     END_CLIP,
@@ -35,18 +35,10 @@ class CC_EXPORT DisplayItem {
     TRANSFORM,
     END_TRANSFORM,
   };
-
-  virtual ~DisplayItem() {}
-
-  virtual void Raster(SkCanvas* canvas,
-                      SkPicture::AbortCallback* callback) const = 0;
-
-  Type type() const { return type_; }
+  const Type type;
 
  protected:
-  explicit DisplayItem(Type type) : type_(type) {}
-
-  const Type type_;
+  explicit DisplayItem(Type type) : type(type) {}
 };
 
 }  // namespace cc