Create an API around PluginService and use it from Chrome.

chrome/browser/metrics/metrics_service.cc

 // Copyright (c) 2011 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.
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
 //
 // A MetricsService instance is typically created at application startup.  It
@@ skipping 159 matching lines @@
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/guid.h"
 #include "chrome/common/metrics_log_manager.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
 #include "content/browser/load_notification_details.h"
-#include "content/browser/plugin_service.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/plugin_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/url_fetcher.h"
 #include "webkit/plugins/webplugininfo.h"
 
 // TODO(port): port browser_distribution.h.
 #if !defined(OS_POSIX)
 #include "chrome/installer/util/browser_distribution.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/external_metrics.h"
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #endif
 
 using base::Time;
 using content::BrowserThread;
+using content::PluginService;
 
 // Check to see that we're being called on only one thread.
 static bool IsSingleThreaded();
 
 static const char kMetricsType[] = "application/vnd.mozilla.metrics.bz2";
 
 // The delay, in seconds, after starting recording before doing expensive
 // initialization work.
 static const int kInitializationDelaySeconds = 30;
 
@@ skipping 1344 matching lines @@
   if (local_state) {
     const PrefService::Preference* uma_pref =
         local_state->FindPreference(prefs::kMetricsReportingEnabled);
     if (uma_pref) {
       bool success = uma_pref->GetValue()->GetAsBoolean(&result);
       DCHECK(success);
     }
   }
   return result;
 }