Move cc::DisplayItemList and related classes into cc/paint/

cc/paint/image_id.h

Index: cc/paint/image_id.h
diff --git a/cc/playback/image_id.h b/cc/paint/image_id.h
similarity index 78%
rename from cc/playback/image_id.h
rename to cc/paint/image_id.h
index 5103857f7900987af2e28a591c3e1980799c8305..0ffaafd782fb20f6869f84cb96f1cf593e212bcb 100644
--- a/cc/playback/image_id.h
+++ b/cc/paint/image_id.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CC_PLAYBACK_IMAGE_ID_H_
-#define CC_PLAYBACK_IMAGE_ID_H_
+#ifndef CC_PAINT_IMAGE_ID_H_
+#define CC_PAINT_IMAGE_ID_H_
 
 #include <stdint.h>
 #include <unordered_set>
@@ -17,4 +17,4 @@ using ImageIdFlatSet = base::flat_set<ImageId>;
 
 }  // namespace cc
 
-#endif  // CC_PLAYBACK_IMAGE_ID_H_
+#endif  // CC_PAINT_IMAGE_ID_H_