NOT FOR LANDING: Thread the needle through all webmodules.

third_party/WebKit/Source/web/agent/agent.h

+// 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.
+
+#ifndef WEB_AGENT_AGENT_H
+#define WEB_AGENT_AGENT_H
+
+#include "platform/heap/Handle.h"
+#include "web/api/frame.h"
+
+namespace web {
+
+class Agent : public blink::GarbageCollectedFinalized<Agent> {
+ public:
+  explicit Agent(Frame* frame) : frame_(frame) {}
+
+  DEFINE_INLINE_TRACE() { visitor->trace(frame_); }
+
+ protected:
+  Frame* GetFrame() const { return frame_; }
+
+ private:
+  blink::Member<Frame> frame_;
+};
+
+}  // namespace web
+
+#endif  // WEB_AGENT_AGENT_H