Simplify the ApplicationLoader interface in preparation for changes.

shell/dynamic_application_loader_unittest.cc

Index: shell/dynamic_application_loader_unittest.cc
diff --git a/shell/dynamic_application_loader_unittest.cc b/shell/dynamic_application_loader_unittest.cc
index 833e4757a90595b0c1c73656dea928faa6f9a015..1d4fa4c3963d870ab427f4e5328d373654637c5a 100644
--- a/shell/dynamic_application_loader_unittest.cc
+++ b/shell/dynamic_application_loader_unittest.cc
@@ -84,8 +84,8 @@ TEST_F(DynamicApplicationLoaderTest, DoesNotExist) {
   base::FilePath nonexistent_file(FILE_PATH_LITERAL("nonexistent.txt"));
   GURL url(FilePathToFileURL(temp_dir.path().Append(nonexistent_file)));
   ApplicationPtr application;
-  loader_->Load(context_.application_manager(), url, GetProxy(&application),
-                ApplicationLoader::SimpleLoadCallback());
+  loader_->Load(url, GetProxy(&application),
+                DynamicApplicationLoader::SimpleLoadCallback());
   EXPECT_FALSE(state_.runner_was_created);
   EXPECT_FALSE(state_.runner_was_started);
   EXPECT_FALSE(state_.runner_was_destroyed);