Revert of Extract some stuff into PackageManager

mojo/shell/package_manager.h

-// Copyright 2015 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.
-
-#ifndef MOJO_SHELL_PACKAGE_MANAGER_H_
-#define MOJO_SHELL_PACKAGE_MANAGER_H_
-
-#include "mojo/services/network/public/interfaces/url_loader.mojom.h"
-#include "mojo/shell/fetcher.h"
-
-class GURL;
-
-namespace mojo {
-namespace shell {
-
-class ApplicationManager;
-
-// A class implementing this interface assists Shell::ConnectToApplication in
-// resolving URLs and fetching the applications located therein.
-class PackageManager {
- public:
-  PackageManager() {}
-  virtual ~PackageManager() {}
-
-  // Called once, during initialization, to tell the package manager about the
-  // associated ApplicationManager.
-  virtual void SetApplicationManager(ApplicationManager* manager) = 0;
-
-  // Resolves |url| to its canonical form. e.g. for mojo: urls, returns a file:
-  // url with a path ending in .mojo.
-  virtual GURL ResolveURL(const GURL& url) = 0;
-
-  // Asks the delegate to fetch the specified url. |url| must be unresolved,
-  // i.e. ResolveURL() above must not have been called on it.
-  // TODO(beng): figure out how not to expose Fetcher at all at this layer.
-  virtual void FetchRequest(
-      URLRequestPtr request,
-      const Fetcher::FetchCallback& loader_callback) = 0;
-
-  // Determine if a content handler should handle the response received by
-  // |fetcher|.
-  // |unresolved_url| is the url requested initially by a call to
-  // Shell::ConnectToApplication() before any resolution is applied.
-  // |task_runner| is a base::TaskRunner* that can be used to post callbacks.
-  // |new_response| is the response that should be passed to
-  // ContentHandler::StartApplication(), unchanged if the return value is false.
-  // |content_handler_url| is the url of the content handler application to
-  // run, unchanged if the return value is false.
-  // |qualifier| is the Identity qualifier that the content handler application
-  // instance should be associated with, unchanged if the return value is false.
-  virtual bool HandleWithContentHandler(Fetcher* fetcher,
-                                        const GURL& unresolved_url,
-                                        base::TaskRunner* task_runner,
-                                        URLResponsePtr* new_response,
-                                        GURL* content_handler_url,
-                                        std::string* qualifier) = 0;
-};
-
-}  // namespace shell
-}  // namespace mojo
-
-#endif  // MOJO_SHELL_PACKAGE_MANAGER_H_