Revert 187340 "PPAPI: Remove threading options; it's always on"

content/ppapi_plugin/ppapi_thread.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 "content/ppapi_plugin/ppapi_thread.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 73 matching lines @@
     : is_broker_(is_broker),
       connect_instance_func_(NULL),
       local_pp_module_(
           base::RandInt(0, std::numeric_limits<PP_Module>::max())),
       next_plugin_dispatcher_id_(1),
       ALLOW_THIS_IN_INITIALIZER_LIST(dispatcher_message_listener_(this)) {
   ppapi::proxy::PluginGlobals* globals = ppapi::proxy::PluginGlobals::Get();
   globals->set_plugin_proxy_delegate(this);
   globals->set_command_line(
       command_line.GetSwitchValueASCII(switches::kPpapiFlashArgs));
+  globals->set_enable_threading(
+      !command_line.HasSwitch(switches::kDisablePepperThreading));
 
   webkit_platform_support_.reset(new PpapiWebKitPlatformSupportImpl);
   WebKit::initialize(webkit_platform_support_.get());
 
   // Register interfaces that expect messages from the browser process. Please
   // note that only those InterfaceProxy-based ones require registration.
   AddRoute(ppapi::API_ID_PPB_TCPSERVERSOCKET_PRIVATE,
            &dispatcher_message_listener_);
   AddRoute(ppapi::API_ID_PPB_TCPSOCKET_PRIVATE,
            &dispatcher_message_listener_);
@@ skipping 350 matching lines @@
 
   // plugin() is NULL when in-process.  Which is fine, because this is
   // just a hook for setting the process name.
   if (GetContentClient()->plugin()) {
     GetContentClient()->plugin()->PluginProcessStarted(
         path.BaseName().RemoveExtension().LossyDisplayName());
   }
 }
 
 }  // namespace content