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diff --git a/components/exo/keyboard_delegate.h b/components/exo/keyboard_delegate.h
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+++ b/components/exo/keyboard_delegate.h
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+// 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 COMPONENTS_EXO_KEYBOARD_DELEGATE_H_
+#define COMPONENTS_EXO_KEYBOARD_DELEGATE_H_
+
+#include <vector>
+
+#include "base/time/time.h"
+
+namespace ui {
+enum class DomCode;
+}
+
+namespace exo {
+class Keyboard;
+class Surface;
+
+// Handles events on keyboards in context-specific ways.
+class KeyboardDelegate {
+ public:
+  // Called at the top of the keyboard's destructor, to give observers a
+  // chance to remove themselves.
+  virtual void OnKeyboardDestroying(Keyboard* keyboard) = 0;
+
+  // This should return true if |surface| is a valid target for this keyboard.
+  // E.g. the surface is owned by the same client as the keyboard.
+  virtual bool CanAcceptKeyboardEventsForSurface(Surface* surface) const = 0;
+
+  // Called when keyboard focus enters a new valid target surface.
+  virtual void OnKeyboardEnter(
+      Surface* surface,
+      const std::vector<ui::DomCode>& pressed_keys) = 0;
+
+  // Called when keyboard focus leaves a valid target surface.
+  virtual void OnKeyboardLeave(Surface* surface) = 0;
+
+  // Called when pkeyboard key state changed. |pressed| is true when |key|
+  // was pressed and false if it was released.
+  virtual void OnKeyboardKey(base::TimeDelta time_stamp,
+                             ui::DomCode key,
+                             bool pressed) = 0;
+
+  // Called when keyboard modifier state changed.
+  virtual void OnKeyboardModifiers(int modifier_flags) = 0;
+
+ protected:
+  virtual ~KeyboardDelegate() {}
+};
+
+}  // namespace exo
+
+#endif  // COMPONENTS_EXO_KEYBOARD_DELEGATE_H_