Clean up PrefServiceBuilder

android_webview/browser/aw_browser_context.h

Index: android_webview/browser/aw_browser_context.h
diff --git a/android_webview/browser/aw_browser_context.h b/android_webview/browser/aw_browser_context.h
index d77393cb9d045fa018c667a37bc8d22a836f4ae6..0705baa9b1860d684e58eecbb8e7f0414b4beb8a 100644
--- a/android_webview/browser/aw_browser_context.h
+++ b/android_webview/browser/aw_browser_context.h
@@ -20,6 +20,7 @@
 #include "net/url_request/url_request_job_factory.h"
 
 class GURL;
+class PrefService;
 
 namespace content {
 class ResourceContext;
@@ -126,7 +127,7 @@ class AwBrowserContext : public content::BrowserContext,
   scoped_ptr<visitedlink::VisitedLinkMaster> visitedlink_master_;
   scoped_ptr<content::ResourceContext> resource_context_;
 
-  bool user_pref_service_ready_;
+  scoped_ptr<PrefService> user_pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(AwBrowserContext);
 };