Clean up calls to ToSkPicture

cc/paint/paint_record.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_PAINT_PAINT_RECORD_H_
 #define CC_PAINT_PAINT_RECORD_H_
 
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace cc {
 
 using PaintRecord = SkPicture;
 
-inline const SkPicture* ToSkPicture(const PaintRecord* record) {
-  return record;
-}
-
-inline SkPicture* ToSkPicture(PaintRecord* record) {
-  return record;
-}
-
 inline sk_sp<SkPicture> ToSkPicture(sk_sp<PaintRecord> record) {
   return record;
 }
 
 inline sk_sp<const SkPicture> ToSkPicture(sk_sp<const PaintRecord> record) {
   return record;
 }
 
 }  // namespace cc
 
 #endif  // CC_PAINT_PAINT_RECORD_H_