mojo: Use ContentHandlers to bundle multiple Applications into a module.

mojo/shell/application_manager.cc

Index: mojo/shell/application_manager.cc
diff --git a/mojo/shell/application_manager.cc b/mojo/shell/application_manager.cc
index 3f51008dbddf2018edbd4b7147cd33f1c42d07fe..44a0c0d410501711eeab625b5a592601ac0fb1f9 100644
--- a/mojo/shell/application_manager.cc
+++ b/mojo/shell/application_manager.cc
@@ -313,6 +313,16 @@ void ApplicationManager::HandleFetchCallback(
     return;
   }
 
+  auto alias_iter = application_package_alias_.find(app_url);
+  if (alias_iter != application_package_alias_.end()) {
+    URLResponsePtr response(URLResponse::New());
+    response->url = String::From(app_url.spec());
+    LoadWithContentHandler(alias_iter->second,
+                           request.Pass(),
+                           response.Pass());
+    return;
+  }
+
   // TODO(aa): Sanity check that the thing we got looks vaguely like a mojo
   // application. That could either mean looking for the platform-specific dll
   // header, or looking for some specific mojo signature prepended to the
@@ -370,6 +380,13 @@ void ApplicationManager::RegisterContentHandler(
   mime_type_to_url_[mime_type] = content_handler_url;
 }
 
+
+void ApplicationManager::RegisterApplicationPackageAlias(
+    const GURL& alias,
+    const GURL& content_handler_package) {
+  application_package_alias_[alias] = content_handler_package;
+}
+
 void ApplicationManager::LoadWithContentHandler(
     const GURL& content_handler_url,
     InterfaceRequest<Application> application_request,