Add --disable-panels for blocking all extensions from using panels.

chrome/common/chrome_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 "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 446 matching lines @@
 const char kEnableNTPSearchEngineCountryDetection[] =
     "enable-ntp-search-engine-country-detection";
 
 // Enable auto-reload of error pages if offline.
 const char kEnableOfflineAutoReload[]       = "enable-offline-auto-reload";
 
 // Only auto-reload error pages when the tab is visible.
 const char kEnableOfflineAutoReloadVisibleOnly[] =
     "enable-offline-auto-reload-visible-only";
 
-// Enables panels (always on-top docked pop-up windows).
+// Enables or disables panels (always on-top docked pop-up windows).
 const char kEnablePanels[]                  = "enable-panels";
+const char kDisablePanels[]                 = "disable-panels";
 
 // Enables the Permissions Blacklist, which blocks access to permissions
 // for blacklisted sites.
 const char kEnablePermissionsBlacklist[] = "enable-permissions-blacklist";
 
 // Enables a number of potentially annoying security features (strict mixed
 // content mode, powerful feature restrictions, etc.)
 const char kEnablePotentiallyAnnoyingSecurityFeatures[] =
     "enable-potentially-annoying-security-features";
 
@@ skipping 901 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