Add generic PaletteDelegate code.

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index eb20851f05d5e91e1374403e04dcad04e064d8f3..8cf7e68383a1015b7b3efa307128b848dc491c85 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -48,6 +48,7 @@
 #include "chrome/browser/ui/ash/launcher/launcher_context_menu.h"
 #include "chrome/browser/ui/ash/media_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
+#include "chrome/browser/ui/ash/palette_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/session_state_delegate_chromeos.h"
 #include "chrome/browser/ui/ash/session_util.h"
 #include "chrome/browser/ui/ash/system_tray_delegate_chromeos.h"
@@ -503,6 +504,10 @@ ash::MediaDelegate* ChromeShellDelegate::CreateMediaDelegate() {
   return new MediaDelegateChromeOS;
 }
 
+ash::PaletteDelegate* ChromeShellDelegate::CreatePaletteDelegate() {
+  return new chromeos::PaletteDelegateChromeOS();
+}
+
 ash::SystemTrayDelegate* ChromeShellDelegate::CreateSystemTrayDelegate() {
   return chromeos::CreateSystemTrayDelegate();
 }