[Origin Trials] Support updates of disabled token list

chrome/browser/chrome_browser_main.cc

 // 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.
 
 #include "chrome/browser/chrome_browser_main.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 855 matching lines @@
         }
       }
       if (!disabled_features.empty()) {
         const std::string override_disabled_features =
             base::JoinString(disabled_features, "|");
         command_line->AppendSwitchASCII(switches::kOriginTrialDisabledFeatures,
                                         override_disabled_features);
       }
     }
   }
+  if (!command_line->HasSwitch(switches::kOriginTrialDisabledTokens)) {
+    const base::ListValue* disabled_token_list =
+        local_state_->GetList(prefs::kOriginTrialDisabledTokens);
+    if (disabled_token_list) {
+      std::vector<std::string> disabled_tokens;
+      std::string disabled_token;
+      for (const auto& item : *disabled_token_list) {
+        if (item->GetAsString(&disabled_token)) {
+          disabled_tokens.push_back(disabled_token);
+        }
+      }
+      if (!disabled_tokens.empty()) {
+        const std::string disabled_token_switch =
+            base::JoinString(disabled_tokens, "|");
+        command_line->AppendSwitchASCII(switches::kOriginTrialDisabledTokens,
+                                        disabled_token_switch);
+      }
+    }
+  }
 }
 
 // -----------------------------------------------------------------------------
 // TODO(viettrungluu): move more/rest of BrowserMain() into BrowserMainParts.
 
 #if defined(OS_WIN)
 #define DLLEXPORT __declspec(dllexport)
 
 // We use extern C for the prototype DLLEXPORT to avoid C++ name mangling.
 extern "C" {
@@ skipping 1225 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif  // defined(OS_CHROMEOS)
 #endif  // defined(OS_ANDROID)
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }