Documents what ApplicationManager::Delegate do

mojo/shell/application_manager/application_manager_unittest.cc

Index: mojo/shell/application_manager/application_manager_unittest.cc
diff --git a/mojo/shell/application_manager/application_manager_unittest.cc b/mojo/shell/application_manager/application_manager_unittest.cc
index f801e36107101d43343977221f7a3c0d17c78fbc..d425f5a990560e4edb1106dd716deca3320b03e4 100644
--- a/mojo/shell/application_manager/application_manager_unittest.cc
+++ b/mojo/shell/application_manager/application_manager_unittest.cc
@@ -402,9 +402,7 @@ class TestDelegate : public ApplicationManager::Delegate {
       return it->second;
     return url;
   }
-
-  // ApplicationManager::Delegate
-  GURL ResolveURL(const GURL& url) override {
+  GURL ResolveMojoURL(const GURL& url) override {
     GURL mapped_url = ResolveMappings(url);
     // The shell automatically map mojo URLs.
     if (mapped_url.scheme() == "mojo") {