Add the UtilityProcessMojoClient class and convert SafeJsonParser

content/public/browser/utility_process_mojo_client_impl.h

Index: content/public/browser/utility_process_mojo_client_impl.h
diff --git a/content/public/browser/utility_process_mojo_client_impl.h b/content/public/browser/utility_process_mojo_client_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..6eea0c45bc53b400f38efa4ab45b44c0d80e4087
--- /dev/null
+++ b/content/public/browser/utility_process_mojo_client_impl.h
@@ -0,0 +1,47 @@
+// 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 CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_MOJO_CLIENT_IMPL_H_
+#define CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_MOJO_CLIENT_IMPL_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/strings/string16.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/content_export.h"
+#include "mojo/public/cpp/system/message_pipe.h"
+
+namespace content {
+
+// Non-templated implementation of UtilityProcessMojoClient.
+class CONTENT_EXPORT UtilityProcessMojoClientImpl {
+ public:
+  explicit UtilityProcessMojoClientImpl(const base::string16& process_name);
+  ~UtilityProcessMojoClientImpl();
+
+  // Disables the sandbox in the utility process.
+  void set_disable_sandbox();
+
+ protected:
+  // Starts the utility process and connect to the remote Mojo service called
+  // |mojo_interface_name| using the |interface_pipe|.
+  void StartImpl(const std::string& mojo_interface_name,
+                 mojo::ScopedMessagePipeHandle interface_pipe);
+
+ private:
+  class Holder;

[Anand Mistry (off Chromium), 2016/06/10 11:13:55]

I'm not a fan of the name Holder... but I don't have a better suggestion.

[Patrick Monette, 2016/06/10 18:13:24]

I think Helper is a bit better.

+
+  scoped_refptr<Holder> holder_;
+
+  // Checks that this class is always accessed from the same thread.
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(UtilityProcessMojoClientImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_UTILITY_PROCESS_MOJO_CLIENT_IMPL_H_