Implement SkEncodeImage()

ui/gfx/codec/install_skia_codec.h

Index: ui/gfx/codec/install_skia_codec.h
diff --git a/ui/gfx/codec/install_skia_codec.h b/ui/gfx/codec/install_skia_codec.h
new file mode 100644
index 0000000000000000000000000000000000000000..b8c2e21a3e56f437c194b559129eed03592b76d1
--- /dev/null
+++ b/ui/gfx/codec/install_skia_codec.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.

[dcheng, 2016/12/20 19:40:47]

Nit: rename this file to something like skia_image_encoder_adapter.

[hal.canary, 2016/12/20 20:45:08]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_GFX_CODEC_INSTALL_SKIA_CODEC_H
+#define UI_GFX_CODEC_INSTALL_SKIA_CODEC_H
+
+#include "third_party/skia/include/core/SkEncodedImageFormat.h"
+#include "ui/gfx/gfx_export.h"
+
+class SkWStream;
+class SkPixmap;
+
+namespace gfx {
+
+// Matches signature of Skia's SkEncodeImage, but makes use of Chromium's
+// encoders.
+GFX_EXPORT bool EncodeImage(SkWStream* dst,

[dcheng, 2016/12/20 19:40:47]

Nit: call this something less generic, since it's an adapter to help Skia use
the gfx image encoding functions, instead of a generic EncodeImage function.

[hal.canary, 2016/12/20 20:45:09]

Done.

+                            const SkPixmap& pixmap,
+                            SkEncodedImageFormat format,
+                            int quality);
+
+}  // namespace gfx
+
+#endif  // UI_GFX_CODEC_INSTALL_SKIA_CODEC_H