Gut ash::MaterialDesignController, and remove the about:flags entry.

ash/shell/content/client/shell_browser_main_parts.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 "ash/shell/content/client/shell_browser_main_parts.h"
 
 #include "ash/common/login_status.h"
-#include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/content/shell_content_state.h"
 #include "ash/shell.h"
 #include "ash/shell/content/shell_content_state_impl.h"
 #include "ash/shell/example_app_list_presenter.h"
 #include "ash/shell/shell_delegate_impl.h"
 #include "ash/shell/window_watcher.h"
 #include "ash/shell_init_params.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 74 matching lines @@
   ui::TouchFactory::SetTouchDeviceListFromCommandLine();
 #endif
 }
 
 void ShellBrowserMainParts::PostMainMessageLoopStart() {
   chromeos::DBusThreadManager::Initialize(
       chromeos::DBusThreadManager::PROCESS_ASH);
 }
 
 void ShellBrowserMainParts::ToolkitInitialized() {
-  ash::MaterialDesignController::Initialize();
   wm_state_.reset(new ::wm::WMState);
 }
 
 void ShellBrowserMainParts::PreMainMessageLoopRun() {
   net_log_.reset(new content::ShellNetLog("ash_shell"));
   browser_context_.reset(
       new content::ShellBrowserContext(false, net_log_.get()));
 
   // A ViewsDelegate is required.
   if (!views::ViewsDelegate::GetInstance())
@@ skipping 57 matching lines @@
   browser_context_.reset();
 }
 
 bool ShellBrowserMainParts::MainMessageLoopRun(int* result_code) {
   base::RunLoop().Run();
   return true;
 }
 
 }  // namespace shell
 }  // namespace ash