ash/chromeos: Add shift-alt-p shortcut to open 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() {}
 
@@ skipping 19 matching lines @@
 }
 
 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() {
   ++take_partial_screenshot_count_;
 }
 
 }  // namespace ash