Revert of [Suggestions] Create ImageEncoder, to abstract away image encode/decode.

components/suggestions/image_encoder.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_ENCODER_H_
-#define COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_H_
-
-#include <vector>
-
-#include "base/macros.h"
-
-class SkBitmap;
-
-namespace suggestions {
-
-// A interface to encode/decode images.
-class ImageEncoder {
- public:
-  ImageEncoder() {}
-  virtual ~ImageEncoder() {}
-
-  // From encoded bytes to SkBitmap. Caller owns the returned pointer.
-  virtual SkBitmap* DecodeImage(
-      const std::vector<unsigned char>& encoded_data) = 0;
-
-  // From SkBitmap to the vector of encoded bytes, |dst|.
-  virtual bool EncodeImage(
-      const SkBitmap& bitmap, std::vector<unsigned char>* dest) = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ImageEncoder);
-};
-
-}  // namespace suggestions
-
-#endif  // COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_H_