Implement an IsAllowed function in the pepper PPB_Broker_Trusted API

chrome/browser/renderer_host/pepper/pepper_broker_host.h

+// Copyright (c) 2012 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 CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_HOST_H_
+#define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_HOST_H_
+
+#include "ppapi/host/resource_host.h"
+
+namespace content {
+class BrowserPpapiHost;
+}
+
+namespace chrome {
+
+class PepperBrokerHost : public ppapi::host::ResourceHost {
+ public:
+  PepperBrokerHost(content::BrowserPpapiHost* host,
+                   PP_Instance instance,
+                   PP_Resource resource);
+  virtual ~PepperBrokerHost();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PepperBrokerHost);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_HOST_H_