Implement an IsAllowed function in the pepper PPB_Broker_Trusted API

ppapi/api/trusted/ppb_broker_trusted.idl

 /* 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.
  */
 
 /**
  * This file defines the PPB_BrokerTrusted interface, which provides
  * access to a trusted broker with greater privileges than the plugin.
  */
 
 label Chrome {
-  M14 = 0.2
+  M14 = 0.2,
+  M25 = 0.3
 };
 
 /**
  * The PPB_BrokerTrusted interface provides access to a trusted broker
  * with greater privileges than the plugin. The interface only supports
  * out-of-process plugins and is to be used by proxy implementations.  All
  * functions should be called from the main thread only.
  *
  * A PPB_BrokerTrusted resource represents a connection to the broker. Its
  * lifetime controls the lifetime of the broker, regardless of whether the
@@ skipping 31 matching lines @@
 
   /**
    * Gets the handle to the pipe. Use once Connect has completed. Each instance
    * of this interface has its own pipe.
    *
    * Returns PP_OK on success, and places the result into the given output
    * parameter. The handle is only set when returning PP_OK. Calling this
    * before connect has completed will return PP_ERROR_FAILED.
    */
   int32_t GetHandle([in] PP_Resource broker, [out] int32_t handle);
+
+  /**
+   * Returns PP_TRUE if the plugin has permission to launch the broker. A user
+   * must explicitly grant permission to launch the broker for a particular
+   * website. This is done through an infobar that is displayed when |Connect|
+   * is called. This function returns PP_TRUE if the user has already granted
+   * permission to launch the broker for the website containing this plugin
+   * instance. Returns PP_FALSE otherwise.
+   */
+  [version=0.3]
+  PP_Bool IsAllowed([in] PP_Resource broker);
 };