Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/app_list_switches.cc

 // Copyright 2013 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 "ui/app_list/app_list_switches.h"
 
 #include "base/command_line.h"
+#include "base/metrics/field_trial_params.h"
+#include "ui/app_list/app_list_features.h"
 
 namespace app_list {
 namespace switches {
 
 // Specifies the chrome-extension:// URL for the contents of an additional page
 // added to the app launcher.
 const char kCustomLauncherPage[] = "custom-launcher-page";
 
 // If set, the app list will not be dismissed when it loses focus. This is
 // useful when testing the app list or a custom launcher page. It can still be
@@ skipping 50 matching lines @@
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           kDisableDriveSearchInChromeLauncher))
     return false;
 
   return true;
 }
 
 }  // namespace switches
 }  // namespace app_list