Make ProfileImageDownloader available to non-chromeos code

chrome/browser/chromeos/login/image_decoder.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 CHROME_BROWSER_CHROMEOS_LOGIN_IMAGE_DECODER_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_IMAGE_DECODER_H_
-#pragma once
-
-#include <string>
-#include <vector>
-
-#include "content/browser/utility_process_host.h"
-
-class SkBitmap;
-
-namespace chromeos {
-
-// Decodes an image in a sandboxed process.
-class ImageDecoder : public UtilityProcessHost::Client {
- public:
-  class Delegate {
-   public:
-    // Called when image is decoded.
-    // |decoder| is used to identify the image in case of decoding several
-    // images simultaneously.
-    virtual void OnImageDecoded(const ImageDecoder* decoder,
-                                const SkBitmap& decoded_image) = 0;
-
-    // Called when decoding image failed. Delegate can do some cleanup in
-    // this handler.
-    virtual void OnDecodeImageFailed(const ImageDecoder* decoder) {}
-
-   protected:
-    virtual ~Delegate() {}
-  };
-
-  ImageDecoder(Delegate* delegate,
-               const std::string& image_data);
-
-  // Starts image decoding.
-  void Start();
-
- private:
-  // It's a reference counted object, so destructor is private.
-  virtual ~ImageDecoder();
-
-  // Overidden from UtilityProcessHost::Client:
-  virtual bool OnMessageReceived(const IPC::Message& message);
-
-  // IPC message handlers.
-  void OnDecodeImageSucceeded(const SkBitmap& decoded_image);
-  void OnDecodeImageFailed();
-
-  // Launches sandboxed process that will decode the image.
-  void DecodeImageInSandbox(const std::vector<unsigned char>& image_data);
-
-  Delegate* delegate_;
-  std::vector<unsigned char> image_data_;
-  content::BrowserThread::ID target_thread_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(ImageDecoder);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_IMAGE_DECODER_H_