Remove calls to deprecated MessageLoop methods on Windows and Linux.

ipc/ipc_channel_unittest.cc

Index: ipc/ipc_channel_unittest.cc
diff --git a/ipc/ipc_channel_unittest.cc b/ipc/ipc_channel_unittest.cc
index fb1e6a631a11765ff7324bcb8cb78d500974e116..9bcc34e88d1478489a1ca734ca392f34d0e06363 100644
--- a/ipc/ipc_channel_unittest.cc
+++ b/ipc/ipc_channel_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/run_loop.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ -78,7 +79,7 @@ TEST_F(IPCChannelTest, ChannelTestExistingPipe) {
   IPC::TestChannelListener::SendOneMessage(sender(), "hello from parent");
 
   // Run message loop.
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   // Close the channel so the client's OnChannelError() gets fired.
   channel()->Close();