Revert of [Suggestions] Move ImageManager to the component

components/suggestions/image_fetcher_delegate.h

-// Copyright 2014 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 COMPONENTS_SUGGESTIONS_IMAGE_FETCHER_DELEGATE_H_
-#define COMPONENTS_SUGGESTIONS_IMAGE_FETCHER_DELEGATE_H_
-
-class GURL;
-class SkBitmap;
-
-namespace suggestions {
-
-class ImageFetcherDelegate {
- public:
-  ImageFetcherDelegate() {}
-
-  // Called when an image was fetched. |url| represents the website for which
-  // the image was fetched. |bitmap| is deleted once out of scope.
-  virtual void OnImageFetched(const GURL& url, const SkBitmap* bitmap) = 0;
-
- protected:
-  virtual ~ImageFetcherDelegate() {}
-
-  DISALLOW_COPY_AND_ASSIGN(ImageFetcherDelegate);
-};
-
-}  // namespace suggestions
-
-#endif  // COMPONENTS_SUGGESTIONS_IMAGE_FETCHER_DELEGATE_H_