Remove --ash-enable-tray-dragging flag

ash/ash_switches.cc

 // Copyright (c) 2012 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 "ash/ash_switches.h"
 
 #include "base/command_line.h"
 
 namespace ash {
 namespace switches {
@@ skipping 53 matching lines @@
 
 // Enables touch view testing.
 // TODO(skuhne): Remove TOGGLE_TOUCH_VIEW_TESTING accelerator once this
 // flag is removed.
 const char kAshEnableTouchViewTesting[] = "ash-enable-touch-view-testing";
 
 // When this flag is set, system sounds will be played whether the
 // ChromeVox is enabled or not.
 const char kAshEnableSystemSounds[] = "ash-enable-system-sounds";
 
-// Enables showing the tray bubble by dragging on the shelf.
-const char kAshEnableTrayDragging[] = "ash-enable-tray-dragging";
-
 // Hides notifications that are irrelevant to Chrome OS device factory testing,
 // such as battery level updates.
 const char kAshHideNotificationsForFactory[] =
     "ash-hide-notifications-for-factory";
 
 // Sets a window size, optional position, and optional scale factor.
 // "1024x768" creates a window of size 1024x768.
 // "100+200-1024x768" positions the window at 100,200.
 // "1024x768*2" sets the scale factor to 2 for a high DPI display.
 const char kAshHostWindowBounds[] = "ash-host-window-bounds";
@@ skipping 20 matching lines @@
 
 #if defined(OS_WIN)
 // Force Ash to open its root window on the desktop, even on Windows 8 where
 // it would normally end up in metro.
 const char kForceAshToDesktop[] = "ash-force-desktop";
 
 #endif
 
 }  // namespace switches
 }  // namespace ash