Add pref to enable/disable palette tray.

chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc

Index: chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc
diff --git a/chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc b/chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc
index 34aa43d80ad6e4ff10594616a60cea71288567fe..73803ea81f7d4408e83b4e086edda0d613ee1e2e 100644
--- a/chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc
+++ b/chrome/browser/ui/webui/options/chromeos/options_stylus_handler.cc
@@ -28,10 +28,14 @@ void OptionsStylusHandler::GetLocalizedValues(
       "stylusAutoOpenStylusTools",
       l10n_util::GetStringUTF16(IDS_SETTINGS_STYLUS_AUTO_OPEN_STYLUS_TOOLS));
   localized_strings->SetString(
+      "stylusEnableStylusTools",
+      l10n_util::GetStringUTF16(IDS_SETTINGS_STYLUS_ENABLE_STYLUS_TOOLS));
+  localized_strings->SetString(
       "stylusFindMoreApps",
       l10n_util::GetStringUTF16(IDS_SETTINGS_STYLUS_FIND_MORE_APPS));
 
-  localized_strings->SetBoolean("showStylusSettings", ash::IsPaletteEnabled());
+  localized_strings->SetBoolean("showStylusSettings",
+                                ash::IsPaletteFeatureEnabled());
 }
 
 void OptionsStylusHandler::InitializePage() {}