Remove remaining calls to deprecated MessageLoop methods.

remoting/protocol/channel_multiplexer_unittest.cc

Index: remoting/protocol/channel_multiplexer_unittest.cc
diff --git a/remoting/protocol/channel_multiplexer_unittest.cc b/remoting/protocol/channel_multiplexer_unittest.cc
index 0cac0452110ba64f01cbbc446894bd21c71ab9ab..9a1e4ee20663ee203d0df7bc80084148b88d115c 100644
--- a/remoting/protocol/channel_multiplexer_unittest.cc
+++ b/remoting/protocol/channel_multiplexer_unittest.cc
@@ -99,7 +99,7 @@ class ChannelMultiplexerTest : public testing::Test {
         &ChannelMultiplexerTest::OnChannelConnected, base::Unretained(this),
         client_socket, &counter));
 
-    message_loop_.Run();
+    base::RunLoop().Run();
 
     EXPECT_TRUE(host_socket->get());
     EXPECT_TRUE(client_socket->get());
@@ -148,7 +148,7 @@ TEST_F(ChannelMultiplexerTest, OneChannel) {
   StreamConnectionTester tester(host_socket.get(), client_socket.get(),
                                 kMessageSize, kMessages);
   tester.Start();
-  message_loop_.Run();
+  base::RunLoop().Run();
   tester.CheckResults();
 }
 
@@ -170,7 +170,7 @@ TEST_F(ChannelMultiplexerTest, TwoChannels) {
   tester1.Start();
   tester2.Start();
   while (!tester1.done() || !tester2.done()) {
-    message_loop_.Run();
+    base::RunLoop().Run();
   }
   tester1.CheckResults();
   tester2.CheckResults();
@@ -212,7 +212,7 @@ TEST_F(ChannelMultiplexerTest, FourChannels) {
   tester4.Start();
   while (!tester1.done() || !tester2.done() ||
          !tester3.done() || !tester4.done()) {
-    message_loop_.Run();
+    base::RunLoop().Run();
   }
   tester1.CheckResults();
   tester2.CheckResults();