Remove calls to deprecated MessageLoop methods in jingle.

jingle/glue/proxy_resolving_client_socket_unittest.cc

Index: jingle/glue/proxy_resolving_client_socket_unittest.cc
diff --git a/jingle/glue/proxy_resolving_client_socket_unittest.cc b/jingle/glue/proxy_resolving_client_socket_unittest.cc
index 866b37d87fffff35d1e222601f31872cbe655e2f..d784cf3c426402cb9f860378504df715188f782c 100644
--- a/jingle/glue/proxy_resolving_client_socket_unittest.cc
+++ b/jingle/glue/proxy_resolving_client_socket_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/base/test_completion_callback.h"
 #include "net/dns/mock_host_resolver.h"
@@ -46,7 +47,7 @@ class ProxyResolvingClientSocketTest : public testing::Test {
   void TearDown() override {
     // Clear out any messages posted by ProxyResolvingClientSocket's
     // destructor.
-    message_loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
   }
 
   base::MessageLoop message_loop_;