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

remoting/host/linux/x11_keyboard_impl.h

Index: remoting/host/linux/x11_keyboard_impl.h
diff --git a/remoting/host/linux/x11_keyboard_impl.h b/remoting/host/linux/x11_keyboard_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..00d418c63d85a45f492b026b04511dd7a453c155
--- /dev/null
+++ b/remoting/host/linux/x11_keyboard_impl.h
@@ -0,0 +1,45 @@
+// Copyright 2016 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.
+
+#ifndef REMOTING_HOST_LINUX_X11_KEYBOARD_IMPL_H_
+#define REMOTING_HOST_LINUX_X11_KEYBOARD_IMPL_H_
+
+#include "remoting/host/linux/x11_keyboard.h"
+
+#include <X11/Xlib.h>
+
+#include "base/macros.h"
+
+namespace remoting {
+
+class X11KeyboardImpl : public X11Keyboard {
+ public:
+  X11KeyboardImpl(Display* display);
+  ~X11KeyboardImpl() override;
+
+  // KeyboardInterface overrides.
+  std::vector<uint32_t> GetUnusedKeycodes() override;
+
+  void PressKey(uint32_t keycode, uint32_t modifiers) override;
+
+  bool FindKeycode(uint32_t code_point,
+                   uint32_t* keycode,
+                   uint32_t* modifiers) override;
+
+  bool ChangeKeyMapping(uint32_t keycode, uint32_t code_point) override;
+
+  void Flush() override;
+
+  void Sync() override;
+
+ private:
+  // X11 graphics context.
+  Display* display_;
+
+  DISALLOW_COPY_AND_ASSIGN(X11KeyboardImpl);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_LINUX_X11_KEYBOARD_IMPL_H_