Remove remaining calls to deprecated MessageLoop methods.

services/shell/tests/shell/shell_unittest.cc

Index: services/shell/tests/shell/shell_unittest.cc
diff --git a/services/shell/tests/shell/shell_unittest.cc b/services/shell/tests/shell/shell_unittest.cc
index d751b16c2d396ea29afeedd39127232f6b83c656..8ecd559b7abb5cd6939beda757fdf4395339f78a 100644
--- a/services/shell/tests/shell/shell_unittest.cc
+++ b/services/shell/tests/shell/shell_unittest.cc
@@ -183,7 +183,7 @@ TEST_F(ShellTest, CreateInstance) {
 
   // 2. Wait for the target to connect to us. (via
   //    mojo:shell_unittest)
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   EXPECT_FALSE(connection->IsPending());
   uint32_t remote_id = connection->GetRemoteInstanceID();
@@ -215,7 +215,7 @@ TEST_F(ShellTest, CreateInstance) {
       base::Bind(&ShellTest::OnDriverQuit,
                  base::Unretained(this)));
   driver->QuitDriver();
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 }
 
 }  // namespace shell