[Remoting Host] Handle text event characters that are not presented on the keyboard

remoting/host/linux/mock_x11_keyboard.cc

Index: remoting/host/linux/mock_x11_keyboard.cc
diff --git a/remoting/protocol/ice_config.cc b/remoting/host/linux/mock_x11_keyboard.cc
similarity index 52%
copy from remoting/protocol/ice_config.cc
copy to remoting/host/linux/mock_x11_keyboard.cc
index 4cd9a152f6beb85ef9cab17e8af09f46f9ec64f4..964c9ee43011e238938f50bbac15e0dd6788a6e9 100644
--- a/remoting/protocol/ice_config.cc
+++ b/remoting/host/linux/mock_x11_keyboard.cc
@@ -2,14 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "remoting/protocol/ice_config.h"
+#include "remoting/host/linux/mock_x11_keyboard.h"
 
 namespace remoting {
-namespace protocol {
 
-IceConfig::IceConfig() {}
-IceConfig::IceConfig(const IceConfig& other) = default;
-IceConfig::~IceConfig() {}
+MockX11Keyboard::MockX11Keyboard() {}
+
+MockX11Keyboard::~MockX11Keyboard() {}
+
+void MockX11Keyboard::Flush() {}
+
+void MockX11Keyboard::Sync() {}
 
-}  // namespace protocol
 }  // namespace remoting