cros: Use runtime stylus detection for ash palette.

ash/shell/shell_delegate_impl.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/shell_delegate_impl.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/default_accessibility_delegate.h"
 #include "ash/common/gpu_support_stub.h"
 #include "ash/common/palette_delegate.h"
@@ skipping 27 matching lines @@
 
   // PaletteDelegate:
   std::unique_ptr<EnableListenerSubscription> AddPaletteEnableListener(
       const EnableListener& on_state_changed) override {
     on_state_changed.Run(false);
     return nullptr;
   }
   void CreateNote() override {}
   bool HasNoteApp() override { return false; }
   void SetPartialMagnifierState(bool enabled) override {}
-  void SetStylusStateChangedCallback(
-      const OnStylusStateChangedCallback& on_stylus_state_changed) override {}
   bool ShouldAutoOpenPalette() override { return false; }
   bool ShouldShowPalette() override { return false; }
   void TakeScreenshot() override {}
   void TakePartialScreenshot(const base::Closure& done) override {
     if (done)
       done.Run();
   }
   void CancelPartialScreenshot() override {}
 
  private:
@@ skipping 154 matching lines @@
   return true;
 }
 
 void ShellDelegateImpl::SetTouchscreenEnabledInPrefs(bool enabled,
                                                      bool use_local_state) {}
 
 void ShellDelegateImpl::UpdateTouchscreenStatusFromPrefs() {}
 
 }  // namespace shell
 }  // namespace ash