Revert of Deletes mojo::Callback

chrome/utility/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 "chrome/utility/image_decoder_impl.h"
 
 #include <string.h>
 
 #include <utility>
 
@@ skipping 23 matching lines @@
     : max_message_size_(kMaxMessageSize), binding_(this, std::move(request)) {
 }
 
 ImageDecoderImpl::~ImageDecoderImpl() {
 }
 
 void ImageDecoderImpl::DecodeImage(
     mojo::Array<uint8_t> encoded_data,
     mojom::ImageCodec codec,
     bool shrink_to_fit,
-    const DecodeImageCallback& callback) {
+    const mojo::Callback<void(const SkBitmap&)>& callback) {
   if (encoded_data.size() == 0) {
     callback.Run(SkBitmap());
     return;
   }
 
   SkBitmap decoded_image;
 #if defined(OS_CHROMEOS)
   if (codec == mojom::ImageCodec::ROBUST_JPEG) {
     // Our robust jpeg decoding is using IJG libjpeg.
     if (encoded_data.size()) {
@@ skipping 38 matching lines @@
             decoded_image, skia::ImageOperations::RESIZE_LANCZOS3,
             decoded_image.width() >> halves, decoded_image.height() >> halves);
       } else {
         decoded_image.reset();
       }
     }
   }
 
   callback.Run(decoded_image);
 }