1 files changed, 36 insertions, 0 deletions
diff --git a/chromium/ash/keyboard_uma_event_filter.h b/chromium/ash/keyboard_uma_event_filter.h
new file mode 100644
index 00000000000..b25f2f934e0
--- /dev/null
+++ b/chromium/ash/keyboard_uma_event_filter.h
@@ -0,0 +1,36 @@
+// Copyright 2013 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 ASH_KEYBOARD_UMA_EVENT_FILTER_H_
+#define ASH_KEYBOARD_UMA_EVENT_FILTER_H_
+
+#include "base/compiler_specific.h"
+#include "base/time/time.h"
+#include "ui/events/event_handler.h"
+
+namespace ash {
+namespace internal {
+
+// EventFilter for tracking keyboard-related metrics, which intercepts events
+// before they are processed by the usual path and logs metrics about the
+// events.
+class KeyboardUMAEventFilter : public ui::EventHandler {
+ public:
+  KeyboardUMAEventFilter();
+  virtual ~KeyboardUMAEventFilter();
+
+  // ui::EventHandler overrides:
+  virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE;
+
+ private:
+  // The timestamp of the last character keystroke.
+  base::TimeDelta last_keystroke_time_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardUMAEventFilter);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_KEYBOARD_UMA_EVENT_FILTER_H_