cros: Use runtime stylus detection for ash palette.

chrome/browser/ui/ash/palette_delegate_chromeos.cc

 // Copyright 2016 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/ash/palette_delegate_chromeos.h"
 
 #include "ash/accelerators/accelerator_controller_delegate_aura.h"
 #include "ash/common/system/chromeos/palette/palette_utils.h"
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
 #include "ash/utility/screenshot_controller.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/note_taking_helper.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_change_registrar.h"
 #include "components/prefs/pref_service.h"
 #include "components/user_manager/user_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
-#include "ui/events/devices/input_device_manager.h"
 
 namespace chromeos {
 
-// static
-std::unique_ptr<PaletteDelegateChromeOS> PaletteDelegateChromeOS::Create() {
-  if (!ash::IsPaletteFeatureEnabled())
-    return nullptr;
-  return base::WrapUnique(new PaletteDelegateChromeOS());
-}
-
 PaletteDelegateChromeOS::PaletteDelegateChromeOS() : weak_factory_(this) {
   registrar_.Add(this, chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, chrome::NOTIFICATION_PROFILE_DESTROYED,
                  content::NotificationService::AllSources());
-
-  ui::InputDeviceManager::GetInstance()->AddObserver(this);
 }
 
-PaletteDelegateChromeOS::~PaletteDelegateChromeOS() {
-  ui::InputDeviceManager::GetInstance()->RemoveObserver(this);
-}
+PaletteDelegateChromeOS::~PaletteDelegateChromeOS() {}
 
 std::unique_ptr<PaletteDelegateChromeOS::EnableListenerSubscription>
 PaletteDelegateChromeOS::AddPaletteEnableListener(
     const EnableListener& on_state_changed) {
   auto subscription = palette_enabled_callback_list_.Add(on_state_changed);
   OnPaletteEnabledPrefChanged();
   return subscription;
 }
 
 void PaletteDelegateChromeOS::CreateNote() {
@@ skipping 67 matching lines @@
   // Run listener with new pref value, if any.
   OnPaletteEnabledPrefChanged();
 }
 
 void PaletteDelegateChromeOS::OnPartialScreenshotDone(
     const base::Closure& then) {
   if (then)
     then.Run();
 }
 
-void PaletteDelegateChromeOS::SetStylusStateChangedCallback(
-    const OnStylusStateChangedCallback& on_stylus_state_changed) {
-  on_stylus_state_changed_ = on_stylus_state_changed;
-}
-
 bool PaletteDelegateChromeOS::ShouldAutoOpenPalette() {
   if (!profile_)
     return false;
 
   return profile_->GetPrefs()->GetBoolean(prefs::kLaunchPaletteOnEjectEvent);
 }
 
 bool PaletteDelegateChromeOS::ShouldShowPalette() {
   if (!profile_)
     return false;
@@ skipping 20 matching lines @@
       screenshot_delegate, false /* draw_overlay_immediately */);
   screenshot_controller->set_on_screenshot_session_done(
       base::Bind(&PaletteDelegateChromeOS::OnPartialScreenshotDone,
                  weak_factory_.GetWeakPtr(), done));
 }
 
 void PaletteDelegateChromeOS::CancelPartialScreenshot() {
   ash::Shell::GetInstance()->screenshot_controller()->CancelScreenshotSession();
 }
 
-void PaletteDelegateChromeOS::OnStylusStateChanged(ui::StylusState state) {
-  on_stylus_state_changed_.Run(state);
-}
 }  // namespace chromeos