[blimp] Add SkPicture caching support.

blimp/test/support/compositor/picture_cache_test_support.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 BLIMP_TEST_SUPPORT_COMPOSITOR_PICTURE_CACHE_TEST_SUPPORT_H_
+#define BLIMP_TEST_SUPPORT_COMPOSITOR_PICTURE_CACHE_TEST_SUPPORT_H_
+
+#include "blimp/common/blob_cache/blob_cache.h"
+#include "cc/proto/picture_cache.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "third_party/skia/include/core/SkColor.h"

[Kevin M, 2016/06/21 21:35:04]

switch these to forward declares where possible?

[nyquist, 2016/06/24 11:11:15]

Sadly, I need this for all of them :-/ SkColor is a number, but is defined in
that header. SkPicture is used in an sk_sp, so it needs the full type, and sk_sp
is declared in SkRefCnt.h...

+#include "third_party/skia/include/core/SkPicture.h"
+#include "third_party/skia/include/core/SkRefCnt.h"
+
+namespace blimp {
+
+// Creates an SkPicture filled with with the given |color|.
+sk_sp<const SkPicture> CreateSkPicture(SkColor color);
+
+// Serializes the given picture into an SkData object.
+sk_sp<SkData> SerializePicture(sk_sp<const SkPicture> picture);
+
+// Serializes an SkPicture and returns the BlobId for the serialized form of
+// the picture.
+BlobId GetBlobId(sk_sp<const SkPicture> picture);
+
+// Deserializes the SkPicture represented by |data.
+sk_sp<const SkPicture> DeserializePicture(sk_sp<SkData> data);
+
+// Compares an SkPicture and SkPicture represented by the SkData in the
+// cc::PictureData.
+bool SamePicture(sk_sp<const SkPicture> picture,

[Kevin M, 2016/06/21 21:35:04]

nittiest of nits: PicturesEqual() ?

[nyquist, 2016/06/24 11:11:15]

Done.

+                 const cc::PictureData& picture_data);
+
+// Utility function to create a valid cc::PictureData from an SkPicture.
+cc::PictureData CreatePictureData(sk_sp<const SkPicture> picture);
+
+MATCHER_P(PictureMatches, picture, "") {
+  return SamePicture(picture, arg);
+}
+
+}  // namespace blimp
+
+#endif  // BLIMP_TEST_SUPPORT_COMPOSITOR_PICTURE_CACHE_TEST_SUPPORT_H_