Update from https://crrev.com/314320

cc/resources/transparency_display_item.h

 // Copyright 2014 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_RESOURCES_TRANSPARENCY_DISPLAY_ITEM_H_
 #define CC_RESOURCES_TRANSPARENCY_DISPLAY_ITEM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/resources/display_item.h"
@@ skipping 14 matching lines @@
       float opacity,
       SkXfermode::Mode blend_mode) {
     return make_scoped_ptr(new TransparencyDisplayItem(opacity, blend_mode));
   }
 
   void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
 
   bool IsSuitableForGpuRasterization() const override;
   int ApproximateOpCount() const override;
   size_t PictureMemoryUsage() const override;
+  void AsValueInto(base::debug::TracedValue* array) const override;
 
  protected:
   TransparencyDisplayItem(float opacity, SkXfermode::Mode blend_mode);
 
  private:
   float opacity_;
   SkXfermode::Mode blend_mode_;
 };
 
 class CC_EXPORT EndTransparencyDisplayItem : public DisplayItem {
  public:
   ~EndTransparencyDisplayItem() override;
 
   static scoped_ptr<EndTransparencyDisplayItem> Create() {
     return make_scoped_ptr(new EndTransparencyDisplayItem());
   }
 
   void Raster(SkCanvas* canvas, SkDrawPictureCallback* callback) const override;
 
   bool IsSuitableForGpuRasterization() const override;
   int ApproximateOpCount() const override;
   size_t PictureMemoryUsage() const override;
+  void AsValueInto(base::debug::TracedValue* array) const override;
 
  protected:
   EndTransparencyDisplayItem();
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TRANSPARENCY_DISPLAY_ITEM_H_