Documents what ApplicationManager::Delegate do

shell/application_manager/application_manager_unittest.cc

Index: shell/application_manager/application_manager_unittest.cc
diff --git a/shell/application_manager/application_manager_unittest.cc b/shell/application_manager/application_manager_unittest.cc
index 25c373ab8dedf2e27d92a705f7707eaf03b3b759..9b14fcb1d5ed87297d7e011b78b291b4ea9fcf95 100644
--- a/shell/application_manager/application_manager_unittest.cc
+++ b/shell/application_manager/application_manager_unittest.cc
@@ -410,9 +410,7 @@ 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") {