[Suggestions] Headers cleanup for iOS image encoder

components/suggestions/image_encoder_ios.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_IOS_H_
-#define COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_IOS_H_
-
-#include <vector>
-
-class SkBitmap;
-
-namespace suggestions {
-
-// From encoded bytes to SkBitmap. It's the caller's responsibility to delete
-// the bitmap.
-SkBitmap* DecodeJPEGToSkBitmap(const std::vector<unsigned char>& encoded_data);
-
-// From SkBitmap to a vector of JPEG-encoded bytes, |dst|.
-bool EncodeSkBitmapToJPEG(const SkBitmap& bitmap,
-                          std::vector<unsigned char>* dest);
-
-}  // namespace suggestions
-
-#endif  // COMPONENTS_SUGGESTIONS_IMAGE_ENCODER_IOS_H_