mash: Have chrome set itself as a controller interface for changing volume

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.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/ui/views/ash/chrome_browser_main_extra_parts_ash.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_browser_main.h"
 #include "chrome/browser/ui/ash/ash_init.h"
 #include "chrome/browser/ui/ash/ash_util.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_mus.h"
 #include "chrome/browser/ui/views/ash/tab_scrubber.h"
 #include "chrome/browser/ui/views/frame/immersive_context_mus.h"
 #include "chrome/browser/ui/views/frame/immersive_handler_factory_mus.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/aura/env.h"
 #include "ui/keyboard/content/keyboard.h"
 #include "ui/keyboard/keyboard_controller.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/ui/ash/system_tray_client.h"
+#include "chrome/browser/ui/ash/volume_controller.h"
 #include "chrome/browser/ui/ash/vpn_list_forwarder.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension.h"
 #include "chrome/browser/ui/views/select_file_dialog_extension_factory.h"
 #endif  // defined(OS_CHROMEOS)
 
 ChromeBrowserMainExtraPartsAsh::ChromeBrowserMainExtraPartsAsh() {}
 
 ChromeBrowserMainExtraPartsAsh::~ChromeBrowserMainExtraPartsAsh() {}
 
 void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
   if (chrome::ShouldOpenAshOnStartup())
     chrome::OpenAsh(gfx::kNullAcceleratedWidget);
 
   if (chrome::IsRunningInMash()) {
     immersive_context_ = base::MakeUnique<ImmersiveContextMus>();
     immersive_handler_factory_ = base::MakeUnique<ImmersiveHandlerFactoryMus>();
   }
 
 #if defined(OS_CHROMEOS)
   // Must be available at login screen, so initialize before profile.
   system_tray_client_ = base::MakeUnique<SystemTrayClient>();
 
+  volume_controller_ = base::MakeUnique<VolumeController>();
+
   vpn_list_forwarder_ = base::MakeUnique<VpnListForwarder>();
 
   // For OS_CHROMEOS, virtual keyboard needs to be initialized before profile
   // initialized. Otherwise, virtual keyboard extension will not load at login
   // screen.
   keyboard::InitializeKeyboard();
 
   ui::SelectFileDialog::SetFactory(new SelectFileDialogExtensionFactory);
 #endif  // defined(OS_CHROMEOS)
 }
@@ skipping 14 matching lines @@
   TabScrubber::GetInstance();
   // Activate virtual keyboard after profile is initialized. It depends on the
   // default profile.
   ash::Shell::GetPrimaryRootWindowController()->ActivateKeyboard(
       keyboard::KeyboardController::GetInstance());
 }
 
 void ChromeBrowserMainExtraPartsAsh::PostMainMessageLoopRun() {
 #if defined(OS_CHROMEOS)
   vpn_list_forwarder_.reset();
+  volume_controller_.reset();
   system_tray_client_.reset();
 #endif
   chrome::CloseAsh();
 }