Extracted NetLog class's inner enum types into their own enum classes and

jingle/glue/proxy_resolving_client_socket.cc

Index: jingle/glue/proxy_resolving_client_socket.cc
diff --git a/jingle/glue/proxy_resolving_client_socket.cc b/jingle/glue/proxy_resolving_client_socket.cc
index 1a420f564b701587286790a701e4d5422c033d26..c6dd137098db2d289bde0906c5cbaddf0f1bbeac 100644
--- a/jingle/glue/proxy_resolving_client_socket.cc
+++ b/jingle/glue/proxy_resolving_client_socket.cc
@@ -18,6 +18,7 @@
 #include "net/http/http_auth_controller.h"
 #include "net/http/http_network_session.h"
 #include "net/http/proxy_client_socket.h"
+#include "net/log/net_log_source_type.h"
 #include "net/socket/client_socket_handle.h"
 #include "net/socket/client_socket_pool_manager.h"
 #include "net/url_request/url_request_context.h"
@@ -46,7 +47,7 @@ ProxyResolvingClientSocket::ProxyResolvingClientSocket(
           bound_net_log_(
               net::BoundNetLog::Make(
                   request_context_getter->GetURLRequestContext()->net_log(),
-                  net::NetLog::SOURCE_SOCKET)),
+                  net::NetLogSourceType::SOCKET)),
           weak_factory_(this) {
   DCHECK(request_context_getter.get());
   net::URLRequestContext* request_context =