First cut at "content handling" support in Mojo.

mojo/shell/dynamic_service_loader_unittest.cc

Index: mojo/shell/dynamic_service_loader_unittest.cc
diff --git a/mojo/shell/dynamic_service_loader_unittest.cc b/mojo/shell/dynamic_service_loader_unittest.cc
index f70d11506c20b5a73025c961a92a4eecaabe51e7..bed95f43a5faec5f0c7465a3c58a0ac8ff77b587 100644
--- a/mojo/shell/dynamic_service_loader_unittest.cc
+++ b/mojo/shell/dynamic_service_loader_unittest.cc
@@ -73,7 +73,9 @@ TEST_F(DynamicServiceLoaderTest, DoesNotExist) {
   base::FilePath nonexistent_file(FILE_PATH_LITERAL("nonexistent.txt"));
   GURL url(net::FilePathToFileURL(temp_dir.path().Append(nonexistent_file)));
   MessagePipe pipe;
-  loader_->LoadService(context_.service_manager(), url, pipe.handle0.Pass());
+  scoped_refptr<ServiceLoader::SimpleLoadServiceCallbacks> callbacks(
+      new ServiceLoader::SimpleLoadServiceCallbacks(pipe.handle0.Pass()));
+  loader_->LoadService(context_.service_manager(), url, callbacks);
   loop_.Run();
   EXPECT_FALSE(state_.runner_was_started);
   EXPECT_TRUE(state_.runner_was_destroyed);