Split ppapi::PluginList from PepperPluginRegistry so that DRT could load pepper plugins.

webkit/plugins/plugin_switches.cc

 // Copyright (c) 2010 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 "webkit/plugins/plugin_switches.h"
 
 namespace switches {
 
 // Enables the testing interface for PPAPI.
 const char kEnablePepperTesting[] = "enable-pepper-testing";
 
 // Dumps extra logging about plugin loading to the log file.
 const char kDebugPluginLoading[] = "debug-plugin-loading";
 
 // Disables NativeClient's access to Pepper3D.
 const char kDisablePepper3dForUntrustedUse[] =
     "disable-pepper-3d-for-untrusted-use";
 
+// Runs PPAPI (Pepper) plugins out-of-process.
+const char kPpapiOutOfProcess[]             = "ppapi-out-of-process";
+
+// Register Pepper plugins (see ppapi/plugin_registry.cc for its format).
+const char kRegisterPepperPlugins[]         = "register-pepper-plugins";
+
 #if defined(OS_WIN)
 // Used by the plugins_test when testing the older WMP plugin to force the new
 // plugin to not get loaded.
 extern const char kUseOldWMPPlugin[] = "use-old-wmp";
 #endif
 
 }  // namespace switches