Fix BufferedSocketWriter not to return any results from Write().

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 94ee44e12251cfe39ccf1f63ef6025ec00efd303..72448e2e4ebdf9724dcb9ed75cc278e4ba1a1f69 100644
--- a/remoting/protocol/channel_multiplexer_unittest.cc
+++ b/remoting/protocol/channel_multiplexer_unittest.cc
@@ -254,18 +254,15 @@ TEST_F(ChannelMultiplexerTest, WriteFailSync) {
 
   MockSocketCallback cb1;
   MockSocketCallback cb2;
+  EXPECT_CALL(cb1, OnDone(net::ERR_FAILED));
+  EXPECT_CALL(cb2, OnDone(net::ERR_FAILED));
 
-  EXPECT_CALL(cb1, OnDone(_))
-      .Times(0);
-  EXPECT_CALL(cb2, OnDone(_))
-      .Times(0);
-
-  EXPECT_EQ(net::ERR_FAILED,
+  EXPECT_EQ(net::ERR_IO_PENDING,
             host_socket1_->Write(buf.get(),
                                  buf->size(),
                                  base::Bind(&MockSocketCallback::OnDone,
                                             base::Unretained(&cb1))));
-  EXPECT_EQ(net::ERR_FAILED,
+  EXPECT_EQ(net::ERR_IO_PENDING,
             host_socket2_->Write(buf.get(),
                                  buf->size(),
                                  base::Bind(&MockSocketCallback::OnDone,