Implement SkEncodeImage()

skia/ext/skia_encode_image.cc

+// Copyright (c) 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.
+
+#include "skia/ext/skia_encode_image.h"
+
+#include "third_party/skia/include/core/SkImageEncoder.h"
+
+static skia::ImageEncoderFunction g_image_encoder = nullptr;
+
+void skia::SetImageEncoder(skia::ImageEncoderFunction image_encoder) {
+  g_image_encoder = image_encoder;
+}
+
+bool SkEncodeImage(SkWStream* stream,
+                   const SkPixmap& pixmap,
+                   SkEncodedImageFormat format,
+                   int quality) {
+  skia::ImageEncoderFunction encoder = g_image_encoder;
+  return encoder && encoder(stream, pixmap, format, quality);
+}