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

This is a small step towards making all singleton classes use the Singleton<T> pattern within their code and not expect the callers to know about it.

This CL includes files under chrome/service and /net with related files elsewhere.

Suggested files to focus for reviewers:
- @sanjeevr for chrome/common and chrome/service
- @ukai for net/websockets
- @agl for rest of net

BUG=65298
TEST=all existing tests should continue to pass.

Review URL: http://codereview.chromium.org/5634005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68722 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 2 deletions

diff --git a/net/socket_stream/socket_stream_job_manager.h b/net/socket_stream/socket_stream_job_manager.h
index 1150058..fbd572d 100644
--- a/net/socket_stream/socket_stream_job_manager.h
+++ b/net/socket_stream/socket_stream_job_manager.h
@@ -12,14 +12,15 @@
 #include "net/socket_stream/socket_stream.h"
 #include "net/socket_stream/socket_stream_job.h"
 
+template <typename T> struct DefaultSingletonTraits;
 class GURL;
 
 namespace net {
 
 class SocketStreamJobManager {
  public:
-  SocketStreamJobManager();
-  ~SocketStreamJobManager();
+  // Returns the singleton instance.
+  static SocketStreamJobManager* GetInstance();
 
   SocketStreamJob* CreateJob(
       const GURL& url, SocketStream::Delegate* delegate) const;
@@ -28,8 +29,12 @@ class SocketStreamJobManager {
       const std::string& scheme, SocketStreamJob::ProtocolFactory* factory);
 
  private:
+  friend struct DefaultSingletonTraits<SocketStreamJobManager>;
   typedef std::map<std::string, SocketStreamJob::ProtocolFactory*> FactoryMap;
 
+  SocketStreamJobManager();
+  ~SocketStreamJobManager();
+
   mutable Lock lock_;
   FactoryMap factories_;