Belated code review regarding pexe content handler.

Adds logging statement for translation process, and fixes
incorrect comment regarding parent class of NaCl content handlers.

See https://codereview.chromium.org/1382713002/ for original CL.

BUG=#396
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/1429953003 .
diff --git a/services/nacl/content_handler_main_nonsfi.cc b/services/nacl/content_handler_main_nonsfi.cc
index 5eee675..86b0ad5 100644
--- a/services/nacl/content_handler_main_nonsfi.cc
+++ b/services/nacl/content_handler_main_nonsfi.cc
@@ -32,7 +32,7 @@
     return true;
   }
 
-  // Overridden from ContentHandlerFactory::ManagedDelegate:
+  // Overridden from ContentHandlerFactory::Delegate:
   void RunApplication(
       mojo::InterfaceRequest<mojo::Application> application_request,
       mojo::URLResponsePtr response) override {