Introduce ui.dll / libui.so for the component build.

ui/gfx/codec/jpeg_codec.h

 // Copyright (c) 2011 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 UI_GFX_CODEC_JPEG_CODEC_H_
 #define UI_GFX_CODEC_JPEG_CODEC_H_
 #pragma once
 
 #include <stddef.h>
 #include <vector>
 
+#include "ui/ui_api.h"
+
 class SkBitmap;
 
 namespace gfx {
 
 // Interface for encoding/decoding JPEG data. This is a wrapper around libjpeg,
 // which has an inconvenient interface for callers. This is only used for UI
 // elements, WebKit has its own more complicated JPEG decoder which handles,
 // among other things, partially downloaded data.
-class JPEGCodec {
+class UI_API JPEGCodec {
  public:
   enum ColorFormat {
     // 3 bytes per pixel (packed), in RGB order regardless of endianness.
     // This is the native JPEG format.
     FORMAT_RGB,
 
     // 4 bytes per pixel, in RGBA order in mem regardless of endianness.
     FORMAT_RGBA,
 
     // 4 bytes per pixel, in BGRA order in mem regardless of endianness.
@@ skipping 29 matching lines @@
 
   // Decodes the JPEG data contained in input of length input_size. If
   // successful, a SkBitmap is created and returned. It is up to the caller
   // to delete the returned bitmap.
   static SkBitmap* Decode(const unsigned char* input, size_t input_size);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CODEC_JPEG_CODEC_H_