Remove CanChallengePlatform() and CheckPlatformState().

ppapi/api/private/ppb_platform_verification_private.idl

 /* Copyright 2013 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 API for platform verification. Currently, it only
  * supports Chrome OS.
  */
 
 [generate_thunk]
 
 label Chrome {
-  M31 = 0.1
+  M32 = 0.2
 };
 
 /**
  * The <code>PPB_PlatformVerification_Private</code> interface allows authorized
  * services to verify that the underlying platform is trusted. An example of a
  * trusted platform is a Chrome OS device in verified boot mode.
  */
 
 interface PPB_PlatformVerification_Private {
   /**
@@ skipping 16 matching lines @@
    * <code>PPB_PlatformVerification_Private</code>.
    *
    * @return <code>PP_TRUE</code> if the resource is a
    * <code>PPB_PlatformVerification_Private</code>, <code>PP_FALSE</code> if the
    * resource is invalid or some type other than
    * <code>PPB_PlatformVerification_Private</code>.
    */
   PP_Bool IsPlatformVerification([in] PP_Resource resource);
 
   /**
-   * Check if the underlying host platform can be challenged; i.e., verified as
-   * a trusted platform. Useful for avoiding unnecessary work on platforms
-   * which will always fail; i.e. dev mode Chrome OS.
-
-   * @param[out] can_challenge_platform A <code>PP_Bool</code> which is set to
-   * <code>PP_TRUE</code> if a platform challenge might pass and
-   * <code>PP_FALSE</code> if it definitely won't.
-   *
-   * @param[in] callback A <code>PP_CompletionCallback</code> to be called after
-   * the method has been completed. This callback will only run if the return
-   * code is <code>PP_OK_COMPLETIONPENDING</code>.
-   *
-   * @return An int32_t containing an error code from <code>pp_errors.h</code>.
-   */
-  int32_t CanChallengePlatform([in] PP_Resource instance,
-                               [out] PP_Bool can_challenge_platform,
-                               [in] PP_CompletionCallback callback);
-
-  /**
    * Requests a platform challenge for a given service id.
    *
    * @param[in] service_id A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_STRING</code> containing the service_id for the challenge.
    *
    * @param[in] challenge A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_ARRAY_BUFFER</code> that contains the challenge data.
    *
    * @param[out] signed_data A <code>PP_Var</code> of type
    * <code>PP_VARTYPE_ARRAY_BUFFER</code> that contains the data signed by the
@@ skipping 15 matching lines @@
    */
   int32_t ChallengePlatform(
       [in] PP_Resource instance,
       [in] PP_Var service_id,
       [in] PP_Var challenge,
       [out] PP_Var signed_data,
       [out] PP_Var signed_data_signature,
       [out] PP_Var platform_key_certificate,
       [in] PP_CompletionCallback callback);
 };