Introduce the image_decoder service

chrome/browser/search/suggestions/image_decoder_impl.cc

 // Copyright 2016 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.
 
 #include <algorithm>
 #include <vector>
 
+#include "base/callback.h"
 #include "chrome/browser/search/suggestions/image_decoder_impl.h"
 #include "ui/gfx/image/image.h"
 
 namespace suggestions {
 
 // A request for decoding an image.
 class ImageDecoderImpl::DecodeImageRequest
     : public ::ImageDecoder::ImageRequest {
  public:
   DecodeImageRequest(ImageDecoderImpl* decoder,
@@ skipping 61 matching lines @@
       std::find_if(decode_image_requests_.begin(),
                    decode_image_requests_.end(),
                    [request](const std::unique_ptr<DecodeImageRequest>& r) {
                      return r.get() == request;
                    });
   DCHECK(request_it != decode_image_requests_.end());
   decode_image_requests_.erase(request_it);
 }
 
 }  // namespace suggestions