Auto open and close the palette on an eject event.

ash/common/palette_delegate.h

Index: ash/common/palette_delegate.h
diff --git a/ash/common/palette_delegate.h b/ash/common/palette_delegate.h
index 6c5c9ba1e0bdd6bb77432177b5d3d600d33a76ea..8cbd492eb80e42b93eab48fd0619a7312433b632 100644
--- a/ash/common/palette_delegate.h
+++ b/ash/common/palette_delegate.h
@@ -22,6 +22,10 @@ class PaletteDelegate {
   // Returns true if there is a note-taking application available.
   virtual bool HasNoteApp() = 0;
 
+  // Returns true if the palette should be automatically opened on an eject
+  // event.
+  virtual bool ShouldAutoOpenPalette() = 0;
+
   // Take a screenshot of the entire window.
   virtual void TakeScreenshot() = 0;