Make it possible for a navigator.connect service to receive messages as base::Value.

content/shell/browser/layout_test/layout_test_navigator_connect_service_factory.h

Index: content/shell/browser/layout_test/layout_test_navigator_connect_service_factory.h
diff --git a/content/shell/browser/layout_test/layout_test_navigator_connect_service_factory.h b/content/shell/browser/layout_test/layout_test_navigator_connect_service_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..e153922b1511936be8dfe886b58221bebdb5e3a6
--- /dev/null
+++ b/content/shell/browser/layout_test/layout_test_navigator_connect_service_factory.h
@@ -0,0 +1,40 @@
+// Copyright 2015 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.
+
+#ifndef CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_
+#define CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_
+
+#include <map>
+#include <string>
+
+#include "content/public/browser/navigator_connect_service_factory.h"
+
+namespace content {
+
+// Implementation of NavigatorConnectServiceFactory that provides services
+// layout tests can connect to under the chrome-layout-test: schema.
+// In particular this implements an 'echo' service, that just sends back any
+// message sends to it, and an 'annotate' service, which sends back some extra
+// metadata in addition to the message it received.
+class LayoutTestNavigatorConnectServiceFactory
+    : public NavigatorConnectServiceFactory {
+ public:
+  LayoutTestNavigatorConnectServiceFactory();
+  ~LayoutTestNavigatorConnectServiceFactory() override;
+
+  // NavigatorConnectServiceFactory implementation.
+  bool HandlesUrl(const GURL& target_url) override;
+  void Connect(const NavigatorConnectClient& client,
+               const ConnectCallback& callback) override;
+
+ private:
+  // |service_| is created and destroyed on the IO thread, while
+  // LayoutTestNavigatorConnectServiceFactory can be destroyed on any thread.
+  class Service;
+  Service* service_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_NAVIGATOR_CONNECT_SERVICE_FACTORY_H_