[Origin Trials] Support updates of disabled token list

chrome/common/origin_trials/chrome_origin_trial_policy.h

 // Copyright 2016 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_COMMON_ORIGIN_TRIALS_CHROME_ORIGIN_TRIAL_POLICY_H_
 #define CHROME_COMMON_ORIGIN_TRIALS_CHROME_ORIGIN_TRIAL_POLICY_H_
 
 #include <set>
 #include <string>
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "content/public/common/origin_trial_policy.h"
 
 // This class is instantiated on the main/ui thread, but its methods can be
 // accessed from any thread.
 class ChromeOriginTrialPolicy : public content::OriginTrialPolicy {
  public:
   ChromeOriginTrialPolicy();
   ~ChromeOriginTrialPolicy() override;
 
   // OriginTrialPolicy interface
   base::StringPiece GetPublicKey() const override;
   bool IsFeatureDisabled(base::StringPiece feature) const override;
+  bool IsTokenDisabled(base::StringPiece token_signature) const override;
 
   bool SetPublicKeyFromASCIIString(const std::string& ascii_public_key);
   bool SetDisabledFeatures(const std::string& disabled_feature_list);
+  bool SetDisabledTokens(const std::string& disabled_token_list);
 
  private:
   std::string public_key_;
   std::set<std::string> disabled_features_;
+  std::set<std::string> disabled_tokens_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeOriginTrialPolicy);
 };
 
 #endif  // CHROME_COMMON_ORIGIN_TRIALS_CHROME_ORIGIN_TRIAL_POLICY_H_