Adds support for headless chrome embedder mojo services

headless/public/util/in_memory_protocol_handler.h

Index: headless/public/util/in_memory_protocol_handler.h
diff --git a/headless/public/util/in_memory_protocol_handler.h b/headless/public/util/in_memory_protocol_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d69d46a9b24d47e99799d8ecb3e9ff63944adf2
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+++ b/headless/public/util/in_memory_protocol_handler.h
@@ -0,0 +1,46 @@
+// Copyright 2016 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 HEADLESS_PUBLIC_UTIL_IN_MEMORY_PROTOCOL_HANDLER_H_
+#define HEADLESS_PUBLIC_UTIL_IN_MEMORY_PROTOCOL_HANDLER_H_
+
+#include <map>
+
+#include "net/url_request/url_request_job_factory.h"
+
+namespace headless {
+
+class InMemoryProtocolHandler
+    : public net::URLRequestJobFactory::ProtocolHandler {
+ public:
+  InMemoryProtocolHandler();
+  ~InMemoryProtocolHandler() override;
+
+  net::URLRequestJob* MaybeCreateJob(
+      net::URLRequest* request,
+      net::NetworkDelegate* network_delegate) const override;
+
+  struct Response {
+    Response() {}
+    Response(const std::string& data, const std::string& mime_type)
+        : data(data), mime_type(mime_type) {}
+
+    std::string data;
+    std::string mime_type;
+  };
+
+  void InsertResponse(const std::string& request_path,
+                      const Response& response);
+
+ private:
+  const Response* GetResponse(const std::string& request_path) const;
+
+  std::map<std::string, Response> response_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(InMemoryProtocolHandler);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_PUBLIC_UTIL_IN_MEMORY_PROTOCOL_HANDLER_H_