Makes MaterialDesignController initialization explicit

ui/base/material_design/material_design_controller.cc

 // Copyright 2015 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 <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "base/trace_event/trace_event.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/ui_base_switches.h"
 
 #if defined(OS_CHROMEOS)
 #include "ui/base/touch/touch_device.h"
 #include "ui/events/devices/device_data_manager.h"
 
 #if defined(USE_OZONE)
 #include <fcntl.h>
 
@@ skipping 49 matching lines @@
 #endif  // defined(USE_OZONE)
   return Mode::MATERIAL_NORMAL;
 #elif defined(OS_LINUX)
   return Mode::MATERIAL_NORMAL;
 #else
   return Mode::NON_MATERIAL;
 #endif  // defined(OS_CHROMEOS)
 }
 
 void MaterialDesignController::InitializeMode() {
+  TRACE_EVENT0("startup", "MaterialDesignController::InitializeMode");
 #if !defined(ENABLE_TOPCHROME_MD)
   SetMode(Mode::NON_MATERIAL);
 #else
   const std::string switch_value =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kTopChromeMD);
 
   if (switch_value == switches::kTopChromeMDMaterial) {
     SetMode(Mode::MATERIAL_NORMAL);
   } else if (switch_value == switches::kTopChromeMDMaterialHybrid) {
@@ skipping 16 matching lines @@
       MaterialDesignController::Mode::NON_MATERIAL);
   is_mode_initialized_ = false;
 }
 
 void MaterialDesignController::SetMode(MaterialDesignController::Mode mode) {
   mode_ = mode;
   is_mode_initialized_ = true;
 }
 
 }  // namespace ui