linux_aura: Port GtkKeybindingsHandler to Aura.

ui/events/x/text_edit_key_bindings_delegate_x11.h

+// Copyright 2014 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 UI_EVENTS_X_TEXT_EDIT_KEY_BINDINGS_DELEGATE_X11_H_
+#define UI_EVENTS_X_TEXT_EDIT_KEY_BINDINGS_DELEGATE_X11_H_
+
+#include <vector>
+
+#include "ui/events/events_export.h"
+
+namespace ui {
+class Event;
+class TextEditCommandX11;
+
+// An interface which can interpret various text editing commands out of key
+// events.
+//
+// On desktop Linux, we've traditionally supported the user's custom
+// keybindings. We need to support this in both content/ and in views/.
+class EVENTS_EXPORT TextEditKeyBindingsDelegateX11 {
+ public:
+  // Matches a key event against the users' platform specific key bindings,
+  // false will be returned if the key event doesn't correspond to a predefined
+  // key binding.  Edit commands matched with |event| will be stored in
+  // |edit_commands|, if |edit_commands| is non-NULL.
+  virtual bool MatchEvent(const ui::Event& event,
+                          std::vector<TextEditCommandX11>* commands) = 0;
+
+ protected:
+  virtual ~TextEditKeyBindingsDelegateX11() {}
+};
+
+// Sets/Gets the global TextEditKeyBindingsDelegateX11. No ownership
+// changes. Can be NULL.
+EVENTS_EXPORT void SetTextEditKeyBindingsDelegate(
+    TextEditKeyBindingsDelegateX11* delegate);
+EVENTS_EXPORT TextEditKeyBindingsDelegateX11* GetTextEditKeyBindingsDelegate();
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_X_TEXT_EDIT_KEY_BINDINGS_DELEGATE_X11_H_