Auto open and close the palette on an eject event.

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 3f63ee14d190394cf032038578258e7787810218..b394e0ee7a70d5f9527f4a2ddf499af9ce5af320 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -88,6 +88,9 @@ class PaletteDelegateImpl : public PaletteDelegate {
   void CreateNote() override {}
   bool HasNoteApp() override { return false; }
   void SetPartialMagnifierState(bool enabled) override {}
+  void SetStylusStateChangedCallback(
+      const OnStylusStateChangedCallback& on_stylus_state_changed) override {}
+  bool ShouldAutoOpenPalette() override { return false; }
   void TakeScreenshot() override {}
   void TakePartialScreenshot() override {}