Add disabled origin trial feature list

chrome/browser/origin_trials/origin_trial_controller.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/origin_trials/origin_trial_controller.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/variations/variations_associated_data.h"
 
 const char OriginTrialController::kFieldTrialName[] = "OriginTrials";
 const char OriginTrialController::kPublicKeyFieldName[] = "PublicKey";
+const char OriginTrialController::kDisabledFeaturesFieldName[] =
+    "DisabledFeatures";
 
 // static
 void OriginTrialController::UpdateCommandLineFromFieldTrials(
     base::CommandLine* command_line) {
   std::map<std::string, std::string> field_params;
   if (!variations::GetVariationParams(kFieldTrialName, &field_params))
     return;
 
   std::string override_public_key = field_params[kPublicKeyFieldName];
   if (!override_public_key.empty()) {
     command_line->AppendSwitchASCII(switches::kOriginTrialPublicKey,
                                     override_public_key);
   }
+  std::string disabled_feature_list = field_params[kDisabledFeaturesFieldName];
+  if (!disabled_feature_list.empty()) {
+    command_line->AppendSwitchASCII(switches::kOriginTrialDisabledFeatures,
+                                    disabled_feature_list);
+  }
 }