Privatize StrongBinding lifetime management

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>
 
 #include "base/logging.h"
 #include "content/public/child/image_decoder_utils.h"
 #include "ipc/ipc_channel.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/geometry/size.h"
 
 #if defined(OS_CHROMEOS)
 #include "ui/gfx/chromeos/codec/jpeg_codec_robust_slow.h"
 #include "ui/gfx/codec/png_codec.h"
 #endif
 
 namespace {
 int64_t kMaxMessageSize = IPC::Channel::kMaximumMessageSize;
 int64_t kPadding = 64;
 }
 
+ImageDecoderImpl::ImageDecoderImpl() : ImageDecoderImpl(kMaxMessageSize) {}
+
 ImageDecoderImpl::ImageDecoderImpl(int64_t max_message_size)
-    : max_message_size_(max_message_size), binding_(this) {
-}
-
-ImageDecoderImpl::ImageDecoderImpl(
-    mojo::InterfaceRequest<mojom::ImageDecoder> request)
-    : max_message_size_(kMaxMessageSize), binding_(this, std::move(request)) {
-}
+    : max_message_size_(max_message_size) {}
 
 ImageDecoderImpl::~ImageDecoderImpl() {
 }
 
 void ImageDecoderImpl::DecodeImage(
     mojo::Array<uint8_t> encoded_data,
     mojom::ImageCodec codec,
     bool shrink_to_fit,
     const DecodeImageCallback& callback) {
   if (encoded_data.size() == 0) {
@@ skipping 47 matching lines @@
             decoded_image, skia::ImageOperations::RESIZE_LANCZOS3,
             decoded_image.width() >> halves, decoded_image.height() >> halves);
       } else {
         decoded_image.reset();
       }
     }
   }
 
   callback.Run(decoded_image);
 }