cros: Use runtime stylus detection for ash palette.

ash/common/test/test_palette_delegate.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 "ash/common/test/test_palette_delegate.h"
 
 namespace ash {
 
 TestPaletteDelegate::TestPaletteDelegate() {}
 
 TestPaletteDelegate::~TestPaletteDelegate() {}
 
 std::unique_ptr<PaletteDelegate::EnableListenerSubscription>
 TestPaletteDelegate::AddPaletteEnableListener(
     const EnableListener& on_state_changed) {
   return nullptr;
 }
 
 void TestPaletteDelegate::CreateNote() {
   ++create_note_count_;
 }
 
 bool TestPaletteDelegate::HasNoteApp() {
   ++has_note_app_count_;
   return has_note_app_;
 }
 
-void TestPaletteDelegate::SetStylusStateChangedCallback(
-    const PaletteDelegate::OnStylusStateChangedCallback&
-        on_stylus_state_changed) {}
-
 bool TestPaletteDelegate::ShouldAutoOpenPalette() {
   return should_auto_open_palette_;
 }
 
 bool TestPaletteDelegate::ShouldShowPalette() {
   return should_show_palette_;
 }
 
 void TestPaletteDelegate::TakeScreenshot() {
   ++take_screenshot_count_;
 }
 
 void TestPaletteDelegate::TakePartialScreenshot(const base::Closure& done) {
   ++take_partial_screenshot_count_;
   partial_screenshot_done_ = done;
 }
 
 void TestPaletteDelegate::CancelPartialScreenshot() {}
 
 }  // namespace ash