Local salient image storage for enhanced bookmark experiment.

components/enhanced_bookmarks/image_store_util.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 COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_
+#define COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_
+
+#include "base/memory/ref_counted_memory.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/image/image.h"
+
+namespace enhanced_bookmarks {
+// The two methods below archive and unarchive an image to and from a bag of
+// bytes. There is no API on gfx::Image capable of doing it while preserving the
+// scale of the image.
+
+// Encode |image| to bytes, that can be decoded using the below |ImageForBytes|
+// function. If encoding fails, then returned scoped_refptr has NULL.
+scoped_refptr<base::RefCountedMemory> BytesForImage(const gfx::Image& image);
+
+// Decode the image bytes encoded by the above |BytesForImage| function and
+// returns a gfx::Image. If decoding fails, returns an empty image.
+gfx::Image ImageForBytes(const scoped_refptr<base::RefCountedMemory>& data);
+
+}
+
+#endif  // COMPONENTS_ENHANCED_BOOKMARKS_IMAGE_STORE_UTIL_H_