Compile Skia image encoders

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);
-}