Auto open and close the palette on an eject event.

chrome/browser/ui/ash/palette_delegate_chromeos.cc

Index: chrome/browser/ui/ash/palette_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/palette_delegate_chromeos.cc b/chrome/browser/ui/ash/palette_delegate_chromeos.cc
index ec2defa2b0379677466d5c8050a0e27dfde46082..3ad24a35d6f2282b719f0a2089a4b2637b0877ca 100644
--- a/chrome/browser/ui/ash/palette_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/palette_delegate_chromeos.cc
@@ -11,6 +11,8 @@
 #include "ash/utility/screenshot_controller.h"
 #include "chrome/browser/chromeos/note_taking_app_utils.h"
 #include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/common/pref_names.h"
+#include "components/prefs/pref_service.h"
 
 namespace chromeos {
 namespace {
@@ -39,6 +41,11 @@ void PaletteDelegateChromeOS::SetPartialMagnifierState(bool enabled) {
   controller->SetEnabled(enabled);
 }
 
+bool PaletteDelegateChromeOS::ShouldAutoOpenPalette() {
+  return GetProfile()->GetPrefs()->GetBoolean(
+      prefs::kLaunchPaletteOnEjectEvent);
+}
+
 void PaletteDelegateChromeOS::TakeScreenshot() {
   auto* screenshot_delegate = ash::Shell::GetInstance()
                                   ->accelerator_controller_delegate()