Enable pepper threading by default.

ppapi/proxy/flash_resource.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 "ppapi/proxy/flash_resource.h"
 
 #include "ipc/ipc_message.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/dispatch_reply_message.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 17 matching lines @@
 
 int32_t FlashResource::EnumerateVideoCaptureDevices(
     PP_Instance instance,
     PP_Resource video_capture,
     const PP_ArrayOutput& devices) {
   ArrayWriter output;
   output.set_pp_array_output(devices);
   if (!output.is_valid())
     return PP_ERROR_BADARGUMENT;
 
-  thunk::EnterResource<thunk::PPB_VideoCapture_API> enter(video_capture, true);
+  thunk::EnterResourceNoLock<thunk::PPB_VideoCapture_API> enter(video_capture,
+                                                                true);
   if (enter.failed())
     return PP_ERROR_NOINTERFACE;
 
   std::vector<ppapi::DeviceRefData> device_ref_data;
   int32_t result =
       SyncCall<PpapiPluginMsg_Flash_EnumerateVideoCaptureDevicesReply>(
           RENDERER,
           PpapiHostMsg_Flash_EnumerateVideoCaptureDevices(
               enter.resource()->host_resource()),
           &device_ref_data);
   if (result != PP_OK)
     return result;
 
   std::vector<scoped_refptr<Resource> > device_resources;
   for (size_t i = 0; i < device_ref_data.size(); ++i) {
     scoped_refptr<Resource> resource(new PPB_DeviceRef_Shared(
         OBJECT_IS_PROXY, instance, device_ref_data[i]));
     device_resources.push_back(resource);
   }
 
   if (!output.StoreResourceVector(device_resources))
     return PP_ERROR_FAILED;
 
   return PP_OK;
 }
 
 }  // namespace proxy
 }  // namespace ppapi