Restore aura support from Mojo repo.

mandoline/ui/aura/input_method_mojo_linux.h

+// Copyright 2015 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 MANDOLINE_UI_AURA_INPUT_METHOD_MOJO_LINUX_H_
+#define MANDOLINE_UI_AURA_INPUT_METHOD_MOJO_LINUX_H_
+
+#include "ui/base/ime/input_method_auralinux.h"
+#include "ui/base/ime/input_method_delegate.h"
+
+namespace mandoline {
+
+// An input method for linux that does absolutely no translation.
+//
+// The current InputMethodMinimal makes assumptions that a system will only
+// input/output keydown/keyup events; it assumes that things don't work like
+// Windows does. When it gets a keydown event, it then tries to insert a
+// character at the same time.
+//
+// However, we're standardizing on Windows' WM_CHAR style events. This tries to
+// follow InputMethodWin::DispatchKeyEvent() instead, because PlatformViewX11
+// now synthesizes a character events so that we have one behaviour across our
+// platforms.
+class InputMethodMojoLinux : public ui::InputMethodAuraLinux {
+ public:
+  explicit InputMethodMojoLinux(ui::internal::InputMethodDelegate* delegate);
+  ~InputMethodMojoLinux() override;
+
+  // Overriden from ui::InputMethodAuraLinux:
+  bool DispatchKeyEvent(const ui::KeyEvent& event) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InputMethodMojoLinux);
+};
+
+}  // namespace mandoline
+
+#endif  // MANDOLINE_UI_AURA_INPUT_METHOD_MOJO_LINUX_H_