cc: Remove all blimp code from cc.

cc/blimp/picture_data_conversions.h

-// Copyright 2016 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_BLIMP_PICTURE_DATA_CONVERSIONS_H_
-#define CC_BLIMP_PICTURE_DATA_CONVERSIONS_H_
-
-#include <memory>
-#include <vector>
-
-#include "cc/base/cc_export.h"
-#include "cc/blimp/picture_data.h"
-
-namespace cc {
-
-namespace proto {
-class SkPictures;
-
-CC_EXPORT void PictureDataVectorToSkPicturesProto(
-    const std::vector<PictureData>& cache_update,
-    SkPictures* proto_pictures);
-
-CC_EXPORT std::vector<PictureData> SkPicturesProtoToPictureDataVector(
-    const SkPictures& proto_pictures);
-
-}  // namespace proto
-}  // namespace cc
-
-#endif  // CC_BLIMP_PICTURE_DATA_CONVERSIONS_H_