ash/chromeos: Add shift-alt-p shortcut to open 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/magnifier/partial_magnification_controller.h"
 #include "ash/screenshot_delegate.h"
 #include "ash/shell.h"
@@ skipping 116 matching lines @@
   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;
+
+  return profile_->GetPrefs()->GetBoolean(prefs::kEnableStylusTools);
+}
+
 void PaletteDelegateChromeOS::TakeScreenshot() {
   auto* screenshot_delegate = ash::Shell::GetInstance()
                                   ->accelerator_controller_delegate()
                                   ->screenshot_delegate();
   screenshot_delegate->HandleTakeScreenshotForAllRootWindows();
 }
 
 void PaletteDelegateChromeOS::TakePartialScreenshot() {
   auto* screenshot_controller =
       ash::Shell::GetInstance()->screenshot_controller();
   auto* screenshot_delegate = ash::Shell::GetInstance()
                                   ->accelerator_controller_delegate()
                                   ->screenshot_delegate();
 
   screenshot_controller->set_pen_events_only(true);
   screenshot_controller->StartPartialScreenshotSession(
       screenshot_delegate, false /* draw_overlay_immediately */);
 }
 
 void PaletteDelegateChromeOS::OnStylusStateChanged(ui::StylusState state) {
   on_stylus_state_changed_.Run(state);
 }
 
 }  // namespace chromeos