Revert of [Suggestions] Move ImageManager to the component

chrome/browser/search/suggestions/image_fetcher_impl.cc

-// 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.
-
-#include "chrome/browser/search/suggestions/image_fetcher_impl.h"
-
-#include <string>
-
-#include "content/public/browser/browser_thread.h"
-#include "net/base/load_flags.h"
-#include "net/url_request/url_request_context_getter.h"
-
-namespace suggestions {
-
-ImageFetcherImpl::ImageFetcherImpl(
-    net::URLRequestContextGetter* url_request_context)
-    : url_request_context_(url_request_context) {}
-
-ImageFetcherImpl::~ImageFetcherImpl() {}
-
-ImageFetcherImpl::ImageRequest::ImageRequest() : fetcher(NULL) {}
-
-ImageFetcherImpl::ImageRequest::ImageRequest(chrome::BitmapFetcher* f)
-    : fetcher(f) {}
-
-ImageFetcherImpl::ImageRequest::~ImageRequest() { delete fetcher; }
-
-void ImageFetcherImpl::SetImageFetcherDelegate(ImageFetcherDelegate* delegate) {
-  DCHECK(delegate);
-  delegate_ = delegate;
-}
-
-void ImageFetcherImpl::StartOrQueueNetworkRequest(
-    const GURL& url, const GURL& image_url,
-    base::Callback<void(const GURL&, const SkBitmap*)> callback) {
-  // Before starting to fetch the image. Look for a request in progress for
-  // |image_url|, and queue if appropriate.
-  ImageRequestMap::iterator it = pending_net_requests_.find(image_url);
-  if (it == pending_net_requests_.end()) {
-    // |image_url| is not being fetched, so create a request and initiate
-    // the fetch.
-    ImageRequest request(new chrome::BitmapFetcher(image_url, this));
-    request.url = url;
-    request.callbacks.push_back(callback);
-    request.fetcher->Start(
-        url_request_context_, std::string(),
-        net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE,
-        net::LOAD_NORMAL);
-    pending_net_requests_[image_url].swap(&request);
-  } else {
-    // Request in progress. Register as an interested callback.
-    it->second.callbacks.push_back(callback);
-  }
-}
-
-void ImageFetcherImpl::OnFetchComplete(const GURL image_url,
-                                       const SkBitmap* bitmap) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
-
-  ImageRequestMap::iterator image_iter = pending_net_requests_.find(image_url);
-  DCHECK(image_iter != pending_net_requests_.end());
-
-  ImageRequest* request = &image_iter->second;
-
-  // Here |bitmap| could be NULL or a pointer to a bitmap which is owned by the
-  // BitmapFetcher and which ceases to exist after this function. Pass the
-  // un-owned pointer to the registered callbacks.
-  for (CallbackVector::iterator callback_iter = request->callbacks.begin();
-       callback_iter != request->callbacks.end(); ++callback_iter) {
-    callback_iter->Run(request->url, bitmap);
-  }
-
-  // Inform the ImageFetcherDelegate.
-  if (delegate_) {
-    delegate_->OnImageFetched(request->url, bitmap);
-  }
-
-  // Erase the completed ImageRequest.
-  pending_net_requests_.erase(image_iter);
-}
-
-}  // namespace suggestions