Convert the PluginService interface to be an async wrapper around PluginList.

chrome/browser/automation/testing_automation_provider.h

Index: chrome/browser/automation/testing_automation_provider.h
diff --git a/chrome/browser/automation/testing_automation_provider.h b/chrome/browser/automation/testing_automation_provider.h
index 06a2b1a3557d56dee7fe6e89bd4acf40ebfd536a..9d9b65c59f48937ab18709dbdf233dde041ea92a 100644
--- a/chrome/browser/automation/testing_automation_provider.h
+++ b/chrome/browser/automation/testing_automation_provider.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ -20,6 +21,7 @@
 #include "content/common/notification_registrar.h"
 #include "content/common/page_type.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
+#include "webkit/plugins/webplugininfo.h"
 
 class ImporterList;
 class TemplateURLService;
@@ -492,6 +494,10 @@ class TestingAutomationProvider : public AutomationProvider,
   void GetPluginsInfo(Browser* browser,
                       base::DictionaryValue* args,
                       IPC::Message* reply_message);
+  void GetPluginsInfoCallback(Browser* browser,
+      base::DictionaryValue* args,
+      IPC::Message* reply_message,
+      const std::vector<webkit::WebPluginInfo>& plugins);
 
   // Enable a plugin.
   // Uses the JSON interface for input/output.