move favicon download code from chrome/ into content/

chrome/browser/favicon/favicon_download_helper.cc

-// Copyright (c) 2012 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/favicon/favicon_download_helper.h"
-
-#include "chrome/browser/favicon/favicon_download_helper_delegate.h"
-#include "chrome/common/icon_messages.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_delegate.h"
-
-using content::WebContents;
-
-namespace {
-static int StartDownload(content::RenderViewHost* rvh,
-                           const GURL& url,
-                           int image_size) {
-  static int id = 0;
-  rvh->Send(new IconMsg_DownloadFavicon(rvh->GetRoutingID(), ++id, url,
-                                        image_size));
-  return id;
-}
-}  // namespace.
-
-FaviconDownloadHelper::FaviconDownloadHelper(
-    WebContents* web_contents,
-    FaviconDownloadHelperDelegate* delegate)
-    : content::WebContentsObserver(web_contents),
-      delegate_(delegate) {
-  DCHECK(delegate_);
-}
-
-FaviconDownloadHelper::~FaviconDownloadHelper() {
-}
-
-int FaviconDownloadHelper::DownloadFavicon(const GURL& url, int image_size) {
-  content::RenderViewHost* host = web_contents()->GetRenderViewHost();
-  int id = StartDownload(host, url, image_size);
-  DownloadIdList::iterator i =
-      std::find(download_ids_.begin(), download_ids_.end(), id);
-  DCHECK(i == download_ids_.end());
-  download_ids_.insert(id);
-  return id;
-}
-
-bool FaviconDownloadHelper::OnMessageReceived(const IPC::Message& message) {
-  bool message_handled = false;   // Allow other handlers to receive these.
-  IPC_BEGIN_MESSAGE_MAP(FaviconDownloadHelper, message)
-    IPC_MESSAGE_HANDLER(IconHostMsg_DidDownloadFavicon, OnDidDownloadFavicon)
-    IPC_MESSAGE_HANDLER(IconHostMsg_UpdateFaviconURL, OnUpdateFaviconURL)
-    IPC_MESSAGE_UNHANDLED(message_handled = false)
-  IPC_END_MESSAGE_MAP()
-  return message_handled;
-}
-
-void FaviconDownloadHelper::OnDidDownloadFavicon(
-    int id,
-    const GURL& image_url,
-    bool errored,
-    int requested_size,
-    const std::vector<SkBitmap>& bitmaps) {
-  DownloadIdList::iterator i =
-      std::find(download_ids_.begin(), download_ids_.end(), id);
-  if (i == download_ids_.end()) {
-    // Currently WebContents notifies us of ANY downloads so that it is
-    // possible to get here.
-    return;
-  }
-  delegate_->OnDidDownloadFavicon(
-      id, image_url, errored, requested_size, bitmaps);
-  download_ids_.erase(i);
-}
-
-void FaviconDownloadHelper::OnUpdateFaviconURL(
-    int32 page_id,
-    const std::vector<FaviconURL>& candidates) {
-  delegate_->OnUpdateFaviconURL(page_id, candidates);
-}