Deprecate --load-component-extension command line flag

chrome/browser/extensions/extension_system_impl.cc

 // Copyright 2014 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_system_impl.h"
 
 #include <algorithm>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
@@ skipping 215 matching lines @@
     extension_service_->component_loader()->
         AddDefaultComponentExtensionsForKioskMode(skip_session_extensions);
   } else {
     extension_service_->component_loader()->AddDefaultComponentExtensions(
         skip_session_extensions);
   }
 #else
   extension_service_->component_loader()->AddDefaultComponentExtensions(
       skip_session_extensions);
 #endif
-  if (command_line->HasSwitch(switches::kLoadComponentExtension)) {
-    base::CommandLine::StringType path_list =
-        command_line->GetSwitchValueNative(switches::kLoadComponentExtension);
-    base::StringTokenizerT<base::CommandLine::StringType,
-                           base::CommandLine::StringType::const_iterator>
-        t(path_list, FILE_PATH_LITERAL(","));
-    while (t.GetNext()) {
-      // Load the component extension manifest synchronously.
-      // Blocking the UI thread is acceptable here since
-      // this flag designated for developers.
-      base::ThreadRestrictions::ScopedAllowIO allow_io;
-      extension_service_->component_loader()->AddOrReplace(
-          base::FilePath(t.token()));
-    }
-  }
 
   app_sorting_.reset(new ChromeAppSorting(profile_));
 
   InitInstallGates();
 
   extension_service_->Init();
 
   // Make sure ExtensionSyncService is created.
   ExtensionSyncService::Get(profile_);
 
@@ skipping 187 matching lines @@
 void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
     const std::string& extension_id,
     const UnloadedExtensionInfo::Reason reason) {
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
 }  // namespace extensions