Update view_manager and window_manager to make use of content handling.

mojo/shell/dynamic_application_loader.cc

Index: mojo/shell/dynamic_application_loader.cc
diff --git a/mojo/shell/dynamic_application_loader.cc b/mojo/shell/dynamic_application_loader.cc
index a5fa0e7d94be870c29bfe6f06463e7070ead4f5b..a4a5e1550147a9a912aefb6989621d075309ce8c 100644
--- a/mojo/shell/dynamic_application_loader.cc
+++ b/mojo/shell/dynamic_application_loader.cc
@@ -160,7 +160,6 @@ class DynamicApplicationLoader::NetworkLoader : public Loader {
         mime_type_to_url_->find(response->mime_type);
     if (iter != mime_type_to_url_->end()) {
       load_callbacks_->LoadWithContentHandler(iter->second, response.Pass());
-      LoaderComplete();
       return;
     }