Implement the palette help and options buttons.

ash/common/system/tray/system_tray_delegate.cc

Index: ash/common/system/tray/system_tray_delegate.cc
diff --git a/ash/common/system/tray/system_tray_delegate.cc b/ash/common/system/tray/system_tray_delegate.cc
index 85e7fd3676081cbbf0ff872dea3ff1c565374dbc..dd481ab3cf926eeaf10f7e59f5600c398f71fe0e 100644
--- a/ash/common/system/tray/system_tray_delegate.cc
+++ b/ash/common/system/tray/system_tray_delegate.cc
@@ -113,6 +113,10 @@ void SystemTrayDelegate::ShowAccessibilityHelp() {}
 
 void SystemTrayDelegate::ShowAccessibilitySettings() {}
 
+void SystemTrayDelegate::ShowPaletteHelp() {}
+
+void SystemTrayDelegate::ShowPaletteSettings() {}
+
 void SystemTrayDelegate::ShowPublicAccountInfo() {}
 
 void SystemTrayDelegate::ShowEnterpriseInfo() {}