Add a new GetInstance() method for singleton classes under chrome/service and /net.

net/socket_stream/socket_stream_job_manager.cc

Index: net/socket_stream/socket_stream_job_manager.cc
diff --git a/net/socket_stream/socket_stream_job_manager.cc b/net/socket_stream/socket_stream_job_manager.cc
index 7dd0d6bbb76c1bc9016ed645c3bfbb2d94ac0e27..de2f0a87ad1b976707c395f1de8c99ee08bc32ba 100644
--- a/net/socket_stream/socket_stream_job_manager.cc
+++ b/net/socket_stream/socket_stream_job_manager.cc
@@ -4,6 +4,8 @@
 
 #include "net/socket_stream/socket_stream_job_manager.h"
 
+#include "base/singleton.h"
+
 namespace net {
 
 SocketStreamJobManager::SocketStreamJobManager() {
@@ -12,6 +14,11 @@ SocketStreamJobManager::SocketStreamJobManager() {
 SocketStreamJobManager::~SocketStreamJobManager() {
 }
 
+// static
+SocketStreamJobManager* SocketStreamJobManager::GetInstance() {
+  return Singleton<SocketStreamJobManager>::get();
+}
+
 SocketStreamJob* SocketStreamJobManager::CreateJob(
     const GURL& url, SocketStream::Delegate* delegate) const {
   // If url is invalid, create plain SocketStreamJob, which will close