--downloads-new-ui completely disables the download shelf.

chrome/common/chrome_switches.cc

 // Copyright (c) 2011 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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 347 matching lines @@
 // Specifies if the |DOMAutomationController| needs to be bound in the
 // renderer. This binding happens on per-frame basis and hence can potentially
 // be a performance bottleneck. One should only enable it when automating
 // dom based tests.
 // Also enables sending/receiving renderer automation messages through the
 // |AutomationRenderViewHelper|.
 // TODO(kkania): Rename this to enable-renderer-automation after moving the
 // |DOMAutomationController| to the |AutomationRenderViewHelper|.
 const char kDomAutomationController[]       = "dom-automation";
 
+// Replaces the download shelf with a new experimental UI.
+const char kDownloadsNewUI[]                = "downloads-new-ui";
+
 // Dump any accumualted histograms to the log when browser terminates (requires
 // logging to be enabled to really do anything).  Used by developers and test
 // scripts.
 const char kDumpHistogramsOnExit[]          = "dump-histograms-on-exit";
 
 // Enables AeroPeek for each tab. (This switch only works on Windows 7).
 const char kEnableAeroPeekTabs[]            = "enable-aero-peek-tabs";
 
 // Enable the inclusion of non-standard ports when generating the Kerberos SPN
 // in response to a Negotiate challenge. See HttpAuthHandlerNegotiate::CreateSPN
@@ skipping 853 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead,
 // please put them in alphabetical order above, or in order inside the
 // appropriate ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches