mojo: kill app_thread before unloading main app library and add tests

mojo/service_manager/service_manager.h

 // 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.
 
 #ifndef MOJO_SERVICE_MANAGER_SERVICE_MANAGER_H_
 #define MOJO_SERVICE_MANAGER_SERVICE_MANAGER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 63 matching lines @@
     default_loader_ = loader.Pass();
   }
   // Sets a Loader to be used for a specific url.
   void SetLoaderForURL(scoped_ptr<ServiceLoader> loader, const GURL& url);
   // Sets a Loader to be used for a specific url scheme.
   void SetLoaderForScheme(scoped_ptr<ServiceLoader> loader,
                           const std::string& scheme);
   // Allows to interpose a debugger to service connections.
   void SetInterceptor(Interceptor* interceptor);
 
+  // Destroys all Shell-ends of connections established with Applications.
+  // Applications connected by this ServiceManager will observe pipe errors
+  // and have a chance to shutdown.
+  void TerminateShellConnections();
+
  private:
   class ShellImpl;
   typedef std::map<std::string, ServiceLoader*> SchemeToLoaderMap;
   typedef std::map<GURL, ServiceLoader*> URLToLoaderMap;
   typedef std::map<GURL, ShellImpl*> URLToShellImplMap;
 
   // Returns the Loader to use for a url (using default if not overridden.)
   // The preference is to use a loader that's been specified for an url first,
   // then one that's been specified for a scheme, then the default.
   ServiceLoader* GetLoaderForURL(const GURL& url);
 
   // Removes a ShellImpl when it encounters an error.
   void OnShellImplError(ShellImpl* shell_impl);
 
   // Loader management.
   URLToLoaderMap url_to_loader_;
   SchemeToLoaderMap scheme_to_loader_;
   scoped_ptr<ServiceLoader> default_loader_;
   Interceptor* interceptor_;
 
   URLToShellImplMap url_to_shell_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceManager);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICE_MANAGER_SERVICE_MANAGER_H_