Move ExtensionDownloader to //extensions

chrome/browser/extensions/updater/extension_downloader_delegate.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/extensions/updater/extension_downloader_delegate.h"
-
-#include "base/logging.h"
-#include "base/version.h"
-
-namespace extensions {
-
-ExtensionDownloaderDelegate::PingResult::PingResult() : did_ping(false) {}
-
-ExtensionDownloaderDelegate::PingResult::~PingResult() {}
-
-ExtensionDownloaderDelegate::~ExtensionDownloaderDelegate() {}
-
-void ExtensionDownloaderDelegate::OnExtensionDownloadFailed(
-    const std::string& id,
-    ExtensionDownloaderDelegate::Error error,
-    const ExtensionDownloaderDelegate::PingResult& ping_result,
-    const std::set<int>& request_id) {}
-
-bool ExtensionDownloaderDelegate::GetPingDataForExtension(
-    const std::string& id,
-    ManifestFetchData::PingData* ping) {
-  return false;
-}
-
-std::string ExtensionDownloaderDelegate::GetUpdateUrlData(
-    const std::string& id) {
-  return std::string();
-}
-
-bool ExtensionDownloaderDelegate::ShouldForceUpdate(
-    const std::string& id,
-    std::string* source) {
-  return false;
-}
-
-}  // namespace extensions