Remove calls to deprecated MessageLoop methods on Windows and Linux.

ipc/ipc_channel_mojo_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ipc/ipc_channel_mojo.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 1284 matching lines @@
   }
 };
 
 TEST_F(IPCChannelMojoTest, VerifyGlobalPid) {
   InitWithMojo("IPCChannelMojoTestVerifyGlobalPidClient");
 
   ListenerThatVerifiesPeerPid listener;
   CreateChannel(&listener);
   ASSERT_TRUE(ConnectChannel());
 
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
   channel()->Close();
 
   EXPECT_TRUE(WaitForClientShutdown());
   DestroyChannel();
 }
 
 DEFINE_IPC_CHANNEL_MOJO_TEST_CLIENT(IPCChannelMojoTestVerifyGlobalPidClient,
                                     ChannelClient) {
   IPC::Channel::SetGlobalPid(kMagicChildId);
   ListenerThatQuits listener;
   Connect(&listener);
 
-  base::MessageLoop::current()->Run();
+  base::RunLoop().Run();
 
   Close();
 }
 
 #endif  // OS_LINUX
 
 }  // namespace