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diff --git a/content/renderer/web_ui_bindings.h b/content/renderer/web_ui_bindings.h
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+// Copyright (c) 2011 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_RENDERER_WEB_UI_BINDINGS_H_
+#define CONTENT_RENDERER_WEB_UI_BINDINGS_H_
+#pragma once
+
+#include "ipc/ipc_message.h"
+#include "webkit/glue/cpp_bound_class.h"
+
+// A DOMBoundBrowserObject is a backing for some object bound to the window
+// in JS that knows how to dispatch messages to an associated c++ object living
+// in the browser process.
+class DOMBoundBrowserObject : public CppBoundClass {
+ public:
+  DOMBoundBrowserObject();
+  virtual ~DOMBoundBrowserObject();
+
+  // Set the message channel back to the browser.
+  void set_message_sender(IPC::Message::Sender* sender) {
+    sender_ = sender;
+  }
+
+  // Set the routing id for messages back to the browser.
+  void set_routing_id(int routing_id) {
+    routing_id_ = routing_id;
+  }
+
+  IPC::Message::Sender* sender() { return sender_; }
+  int routing_id() { return routing_id_; }
+
+  // Sets a property with the given name and value.
+  void SetProperty(const std::string& name, const std::string& value);
+
+ private:
+  // Our channel back to the browser is a message sender
+  // and routing id.
+  IPC::Message::Sender* sender_;
+  int routing_id_;
+
+  // The list of properties that have been set.  We keep track of this so we
+  // can free them on destruction.
+  typedef std::vector<CppVariant*> PropertyList;
+  PropertyList properties_;
+
+  DISALLOW_COPY_AND_ASSIGN(DOMBoundBrowserObject);
+};
+
+// WebUIBindings is the class backing the "chrome" object accessible
+// from Javascript from privileged pages.
+//
+// We expose one function, for sending a message to the browser:
+//   send(String name, Object argument);
+// It's plumbed through to the OnWebUIMessage callback on RenderViewHost
+// delegate.
+class WebUIBindings : public DOMBoundBrowserObject {
+ public:
+  WebUIBindings();
+  virtual ~WebUIBindings();
+
+  // The send() function provided to Javascript.
+  void send(const CppArgumentList& args, CppVariant* result);
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebUIBindings);
+};
+
+#endif  // CONTENT_RENDERER_WEB_UI_BINDINGS_H_