Move common ImageFetcher component files to core/

components/image_fetcher/image_data_fetcher.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 "components/image_fetcher/image_data_fetcher.h"
-
-#include "net/base/load_flags.h"
-#include "net/http/http_response_headers.h"
-#include "net/http/http_status_code.h"
-#include "net/url_request/url_fetcher.h"
-#include "net/url_request/url_request_context_getter.h"
-#include "net/url_request/url_request_status.h"
-#include "url/gurl.h"
-
-using data_use_measurement::DataUseUserData;
-
-namespace image_fetcher {
-
-// An active image URL fetcher request. The struct contains the related requests
-// state.
-struct ImageDataFetcher::ImageDataFetcherRequest {
-  ImageDataFetcherRequest(const ImageDataFetcherCallback& callback,
-                          std::unique_ptr<net::URLFetcher> url_fetcher)
-    : callback(callback),
-      url_fetcher(std::move(url_fetcher)) {}
-
-  ~ImageDataFetcherRequest() {}
-
-  // The callback to run after the image data was fetched. The callback will
-  // be run even if the image data could not be fetched successfully.
-  ImageDataFetcherCallback callback;
-
-  std::unique_ptr<net::URLFetcher> url_fetcher;
-};
-
-ImageDataFetcher::ImageDataFetcher(
-    net::URLRequestContextGetter* url_request_context_getter)
-    : url_request_context_getter_(url_request_context_getter),
-      data_use_service_name_(DataUseUserData::IMAGE_FETCHER_UNTAGGED),
-      next_url_fetcher_id_(0) {}
-
-ImageDataFetcher::~ImageDataFetcher() {}
-
-void ImageDataFetcher::SetDataUseServiceName(
-    DataUseServiceName data_use_service_name) {
-  data_use_service_name_ = data_use_service_name;
-}
-
-void ImageDataFetcher::FetchImageData(
-    const GURL& image_url,
-    const ImageDataFetcherCallback& callback) {
-  FetchImageData(
-      image_url, callback, /*referrer=*/std::string(),
-      net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE);
-}
-
-void ImageDataFetcher::FetchImageData(
-    const GURL& image_url,
-    const ImageDataFetcherCallback& callback,
-    const std::string& referrer,
-    net::URLRequest::ReferrerPolicy referrer_policy) {
-  std::unique_ptr<net::URLFetcher> url_fetcher = net::URLFetcher::Create(
-      next_url_fetcher_id_++, image_url, net::URLFetcher::GET, this);
-
-  DataUseUserData::AttachToFetcher(url_fetcher.get(), data_use_service_name_);
-
-  std::unique_ptr<ImageDataFetcherRequest> request(
-      new ImageDataFetcherRequest(callback, std::move(url_fetcher)));
-  request->url_fetcher->SetRequestContext(url_request_context_getter_.get());
-  request->url_fetcher->SetReferrer(referrer);
-  request->url_fetcher->SetReferrerPolicy(referrer_policy);
-  request->url_fetcher->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
-                                     net::LOAD_DO_NOT_SAVE_COOKIES |
-                                     net::LOAD_DO_NOT_SEND_AUTH_DATA);
-  request->url_fetcher->Start();
-
-  pending_requests_[request->url_fetcher.get()] = std::move(request);
-}
-
-void ImageDataFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
-  auto request_iter = pending_requests_.find(source);
-  DCHECK(request_iter != pending_requests_.end());
-
-  bool success = source->GetStatus().status() == net::URLRequestStatus::SUCCESS;
-
-  RequestMetadata metadata;
-  if (success && source->GetResponseHeaders()) {
-    source->GetResponseHeaders()->GetMimeType(&metadata.mime_type);
-    metadata.http_response_code = source->GetResponseHeaders()->response_code();
-    success &= (metadata.http_response_code == net::HTTP_OK);
-  }
-  metadata.from_http_cache = source->WasCached();
-
-  std::string image_data;
-  if (success) {
-    source->GetResponseAsString(&image_data);
-  }
-  request_iter->second->callback.Run(image_data, metadata);
-
-  // Remove the finished request.
-  pending_requests_.erase(request_iter);
-}
-
-}  // namespace image_fetcher