[instrumentation] Introduce JSON5 config files for probe generator.

third_party/WebKit/Source/platform/probe/templates/ProbeSink.h.tmpl

-// This file is generated from {{input_file}}
-
-// Copyright 2017 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.
-
-{% set sink_class = (name | to_singular) + "Sink" %}
-
-#ifndef {{sink_class}}_h
-#define {{sink_class}}_h
-
-#include "platform/heap/HeapAllocator.h"
-{% for define in defines %}
-{{define}}
-{% endfor %}
-
-namespace blink {
-
-{% for agent in agents %}
-class {{ agent | agent_name_to_class }};
-{% endfor %}
-
-class PROBE_EXPORT {{sink_class}} : public GarbageCollected<{{sink_class}}> {
-  WTF_MAKE_NONCOPYABLE({{sink_class}});
-
- public:
-  {{sink_class}}();
-  DECLARE_TRACE();
-
-{% for agent in agents %}
-{% set class_name = agent | agent_name_to_class %}
-{% set getter_name = class_name | to_lower_case %}
-  bool has{{class_name}}s() const { return m_has{{class_name}}s; }
-  const HeapHashSet<Member<{{class_name}}>>& {{getter_name}}s() const { return m_{{getter_name}}s; }
-  void add{{class_name}}({{class_name}}* agent);
-  void remove{{class_name}}({{class_name}}* agent);
-
-{% endfor %}
- private:
-{% for agent in agents %}
-{% set class_name = agent | agent_name_to_class %}
-{% set getter_name = class_name | to_lower_case %}
-  HeapHashSet<Member<{{class_name}}>> m_{{getter_name}}s;
-  bool m_has{{class_name}}s = false;
-{% endfor %}
-};
-
-} // namespace blink
-
-#endif // !defined({{sink_class}}_h)