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

apps/shell/browser/shell_extension_system.cc

 // Copyright 2013 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 "apps/shell/browser/shell_extension_system.h"
 
 #include <string>
 
 #include "apps/app_window_registry.h"
 #include "base/command_line.h"
@@ skipping 57 matching lines @@
       content::Details<const Extension>(extension));
 
   // Inform the rest of the extensions system to start.
   ready_.Signal();
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSIONS_READY,
       content::Source<BrowserContext>(browser_context_),
       content::NotificationService::NoDetails());
 
   // This is effectively the same behavior as
-  // extensions::AppEventRouter::DispatchOnLaunchedEvent without any dependency
+  // apps::AppEventRouter::DispatchOnLaunchedEvent without any dependency
   // on ExtensionSystem or Profile.
   scoped_ptr<base::DictionaryValue> launch_data(new base::DictionaryValue());
   launch_data->SetBoolean("isKioskSession", false);
   scoped_ptr<base::ListValue> event_args(new base::ListValue());
   event_args->Append(launch_data.release());
   scoped_ptr<Event> event(
       new Event("app.runtime.onLaunched", event_args.Pass()));
   event_router_->DispatchEventWithLazyListener(extension->id(), event.Pass());
 
   return true;
@@ skipping 92 matching lines @@
 void ShellExtensionSystem::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
 }
 
 const OneShotEvent& ShellExtensionSystem::ready() const {
   return ready_;
 }
 
 }  // namespace extensions