Make cc/paint have concrete types

cc/paint/paint_shader.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_SHADER_H_
 #define CC_PAINT_PAINT_SHADER_H_
 
 #include "cc/paint/paint_record.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkShader.h"
@@ skipping 17 matching lines @@
                                                SkShader::TileMode ty,
                                                const SkMatrix* local_matrix) {
   return image->makeShader(tx, ty, local_matrix);
 }
 
 inline sk_sp<PaintShader> MakePaintShaderRecord(sk_sp<PaintRecord> record,
                                                 SkShader::TileMode tx,
                                                 SkShader::TileMode ty,
                                                 const SkMatrix* local_matrix,
                                                 const SkRect* tile) {
-  return SkShader::MakePictureShader(record, tx, ty, local_matrix, tile);
+  return SkShader::MakePictureShader(ToSkPicture(record), tx, ty, local_matrix,
+                                     tile);
 }
 
 }  // namespace cc
 
 #endif  // CC_PAINT_PAINT_SHADER_H_