Move ChromeRequirementsChecker to //extensions as a PreloadCheck

chrome/browser/extensions/extension_service.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/extensions/extension_service.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <iterator>
@@ skipping 636 matching lines @@
     base::CommandLine::StringType path_list =
         command_line_->GetSwitchValueNative(switch_name);
     base::StringTokenizerT<base::CommandLine::StringType,
                            base::CommandLine::StringType::const_iterator>
         t(path_list, FILE_PATH_LITERAL(","));
     while (t.GetNext()) {
       std::string extension_id;
       extensions::UnpackedInstaller::Create(this)->LoadFromCommandLine(
           base::FilePath(t.token()), &extension_id, false /*only-allow-apps*/);
       // Extension id is added to whitelist after its extension is loaded
-      // because code is executed asynchronously.
+      // because code is executed asynchronously. TODO(michaelpg): Remove this
+      // assumption so loading extensions does not have to be asynchronous:
+      // crbug.com/708354.
       if (switch_name == switches::kDisableExtensionsExcept)
         disable_flag_exempted_extensions_.insert(extension_id);
     }
   }
 }
 
 void ExtensionService::ReloadExtensionImpl(
     // "transient" because the process of reloading may cause the reference
     // to become invalid. Instead, use |extension_id|, a copy.
     const std::string& transient_extension_id,
@@ skipping 1891 matching lines @@
 }
 
 void ExtensionService::OnProfileDestructionStarted() {
   ExtensionIdSet ids_to_unload = registry_->enabled_extensions().GetIDs();
   for (ExtensionIdSet::iterator it = ids_to_unload.begin();
        it != ids_to_unload.end();
        ++it) {
     UnloadExtension(*it, UnloadedExtensionInfo::REASON_PROFILE_SHUTDOWN);
   }
 }