First cut at "content handling" support in Mojo.

mojo/service_manager/service_loader.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/service_manager/service_loader.h"
+
+#include "base/logging.h"
+
+namespace mojo {
+
+ServiceLoader::SimpleLoadCallbacks::SimpleLoadCallbacks(
+    ScopedMessagePipeHandle shell_handle)
+    : shell_handle_(shell_handle.Pass()) {
+}
+
+ServiceLoader::SimpleLoadCallbacks::~SimpleLoadCallbacks() {
+}
+
+ScopedMessagePipeHandle
+ServiceLoader::SimpleLoadCallbacks::RegisterApplication() {
+  return shell_handle_.Pass();
+}
+
+void ServiceLoader::SimpleLoadCallbacks::LoadWithContentHandler(
+    const GURL& content_handle_url, URLResponsePtr content) {
+  NOTREACHED();
+}
+
+}  // namespace mojo