Add pref to enable/disable palette tray.

chrome/browser/chromeos/note_taking_app_utils.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/note_taking_app_utils.h"
 
 #include <string>
 #include <vector>
 
 #include "apps/launcher.h"
@@ skipping 51 matching lines @@
           id, extensions::ExtensionRegistry::ENABLED);
     }
   }
   return nullptr;
 }
 
 }  // namespace
 
 bool IsNoteTakingAppAvailable(Profile* profile) {
   DCHECK(profile);
-  return ash::IsPaletteEnabled() && GetApp(profile);
+  return ash::IsPaletteFeatureEnabled() && GetApp(profile);
 }
 
 void LaunchNoteTakingAppForNewNote(Profile* profile,
                                    const base::FilePath& path) {
   DCHECK(profile);
   const extensions::Extension* app = GetApp(profile);
   if (!app) {
     LOG(ERROR) << "Failed to find note-taking app";
     return;
   }
 
   auto action_data = base::MakeUnique<app_runtime::ActionData>();
   action_data->action_type = app_runtime::ActionType::ACTION_TYPE_NEW_NOTE;
   apps::LaunchPlatformAppWithAction(profile, app, std::move(action_data), path);
 }
 
 }  // namespace chromeos