Make members of Singleton<T> private and only visible to the singleton type.

net/websockets/websocket_job.cc

Index: net/websockets/websocket_job.cc
diff --git a/net/websockets/websocket_job.cc b/net/websockets/websocket_job.cc
index 9adbaa341ce1dcaa94f6116f550eedd11c544032..44c944db39ff3fad6a1ef2c1df87923cedcfefc7 100644
--- a/net/websockets/websocket_job.cc
+++ b/net/websockets/websocket_job.cc
@@ -6,7 +6,7 @@
 
 #include <algorithm>
 
-#include "base/singleton.h"
+#include "base/lazy_instance.h"
 #include "base/string_tokenizer.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_errors.h"
@@ -40,20 +40,23 @@ net::SocketStreamJob* WebSocketJobFactory(
 
 class WebSocketJobInitSingleton {
  private:
-  friend struct DefaultSingletonTraits<WebSocketJobInitSingleton>;
+  friend struct base::DefaultLazyInstanceTraits<WebSocketJobInitSingleton>;
   WebSocketJobInitSingleton() {
     net::SocketStreamJob::RegisterProtocolFactory("ws", WebSocketJobFactory);
     net::SocketStreamJob::RegisterProtocolFactory("wss", WebSocketJobFactory);
   }
 };
 
+static base::LazyInstance<WebSocketJobInitSingleton> g_websocket_job_init(
+    base::LINKER_INITIALIZED);
+
 }  // anonymous namespace
 
 namespace net {
 
 // static
 void WebSocketJob::EnsureInit() {
-  Singleton<WebSocketJobInitSingleton>::get();
+  g_websocket_job_init.Get();
 }
 
 WebSocketJob::WebSocketJob(SocketStream::Delegate* delegate)