Introduce apps API target in //apps and move app.runtime API into it

chrome/browser/extensions/api/app_runtime/app_runtime_api.h

-// 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.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_API_APP_RUNTIME_APP_RUNTIME_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_APP_RUNTIME_APP_RUNTIME_API_H_
-
-#include <string>
-
-class GURL;
-
-namespace content {
-class BrowserContext;
-class WebContents;
-}
-
-namespace extensions {
-
-class Extension;
-
-namespace app_file_handler_util {
-struct GrantedFileEntry;
-}
-
-class AppEventRouter {
- public:
-  // Dispatches the onLaunched event to the given app.
-  static void DispatchOnLaunchedEvent(content::BrowserContext* context,
-                                      const Extension* extension);
-
-  // Dispatches the onRestarted event to the given app, providing a list of
-  // restored file entries from the previous run.
-  static void DispatchOnRestartedEvent(content::BrowserContext* context,
-                                       const Extension* extension);
-
-  // TODO(benwells): Update this comment, it is out of date.
-  // Dispatches the onLaunched event to the given app, providing launch data of
-  // the form:
-  // {
-  //   "intent" : {
-  //     "type" : "chrome-extension://fileentry",
-  //     "data" : a FileEntry,
-  //     "postResults" : a null function,
-  //     "postFailure" : a null function
-  //   }
-  // }
-
-  // The FileEntry is created from |file_system_id| and |base_name|.
-  // |handler_id| corresponds to the id of the file_handlers item in the
-  // manifest that resulted in a match which triggered this launch.
-  static void DispatchOnLaunchedEventWithFileEntry(
-      content::BrowserContext* context,
-      const Extension* extension,
-      const std::string& handler_id,
-      const std::string& mime_type,
-      const extensions::app_file_handler_util::GrantedFileEntry& file_entry);
-
-  // |handler_id| corresponds to the id of the url_handlers item
-  // in the manifest that resulted in a match which triggered this launch.
-  static void DispatchOnLaunchedEventWithUrl(content::BrowserContext* context,
-                                             const Extension* extension,
-                                             const std::string& handler_id,
-                                             const GURL& url,
-                                             const GURL& referrer_url);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_APP_RUNTIME_APP_RUNTIME_API_H_