Add PluginServiceFilter interface.

chrome/browser/browser_process_impl.cc

Index: chrome/browser/browser_process_impl.cc
diff --git a/chrome/browser/browser_process_impl.cc b/chrome/browser/browser_process_impl.cc
index 0d4be7ffa69f492cdc8eea6be4e73b369b773059..2c772673337f843c0f3fad5895442a5a5b6274e6 100644
--- a/chrome/browser/browser_process_impl.cc
+++ b/chrome/browser/browser_process_impl.cc
@@ -20,6 +20,7 @@
 #include "chrome/browser/browser_main.h"
 #include "chrome/browser/browser_process_sub_thread.h"
 #include "chrome/browser/browser_trial.h"
+#include "chrome/browser/chrome_plugin_service_helper.h"
 #include "chrome/browser/debugger/devtools_protocol_handler.h"
 #include "chrome/browser/debugger/remote_debugging_server.h"
 #include "chrome/browser/download/download_file_manager.h"
@@ -716,6 +717,7 @@ void BrowserProcessImpl::CreateIOThread() {
   // on the main thread. The service ctor is inexpensive and does not
   // invoke the io_thread() accessor.
   PluginService::GetInstance();
+  ChromePluginServiceHelper::GetInstance();
 
   // Add the Chrome specific plugins.
   chrome::RegisterInternalDefaultPlugin();