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 7ad6cef9ed00c6bc5aa4e00faa622be3516be094..e07515f4964f022c4ebadbeeef19a1b066450d56 100644
--- a/chrome/browser/ui/ash/palette_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/palette_delegate_chromeos.cc
@@ -10,6 +10,8 @@
 #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 {
@@ -32,6 +34,11 @@ bool PaletteDelegateChromeOS::HasNoteApp() {
   return chromeos::IsNoteTakingAppAvailable(GetProfile());
 }
 
+bool PaletteDelegateChromeOS::ShouldAutoOpenPalette() {
+  return GetProfile()->GetPrefs()->GetBoolean(
+      prefs::kLaunchPaletteOnEjectEvent);
+}
+
 void PaletteDelegateChromeOS::TakeScreenshot() {
   auto screenshot_controller =
       ash::Shell::GetInstance()->screenshot_controller();