Update from https://crrev.com/306655

cc/resources/picture_pile_impl.h

 // Copyright 2012 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_PICTURE_PILE_IMPL_H_
 #define CC_RESOURCES_PICTURE_PILE_IMPL_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 49 matching lines @@
   gfx::Size GetSize() const override;
   bool IsSolidColor() const override;
   SkColor GetSolidColor() const override;
   bool HasRecordings() const override;
   bool CanUseLCDText() const override;
 
   // Tracing functionality.
   void DidBeginTracing() override;
   void AsValueInto(base::debug::TracedValue* array) const override;
   skia::RefPtr<SkPicture> GetFlattenedPicture() override;
+  size_t GetPictureMemoryUsage() const override;
 
   // Iterator used to return SkPixelRefs from this picture pile.
   // Public for testing.
   class CC_EXPORT PixelRefIterator {
    public:
     PixelRefIterator(const gfx::Rect& content_rect,
                      float contents_scale,
                      const PicturePileImpl* picture_pile);
     ~PixelRefIterator();
 
@@ skipping 68 matching lines @@
   gfx::Rect PaddedRect(const PictureMapKey& key) const;
 
   bool should_attempt_to_use_distance_field_text_;
 
   DISALLOW_COPY_AND_ASSIGN(PicturePileImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_PILE_IMPL_H_