Regression: Search+Key pops up app launcher

ui/base/accelerators/accelerator_history.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_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_
+#define UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_
+
+#include "base/memory/singleton.h"
+#include "ui/base/accelerators/accelerator.h"
+#include "ui/base/ui_base_export.h"
+#include "ui/events/event.h"
+#include "ui/events/event_handler.h"
+
+namespace ui {
+
+// Keeps track of the system-wide current and the most recent previous
+// key accelerators.
+class UI_BASE_EXPORT AcceleratorHistory {
+ public:
+  AcceleratorHistory();
+  ~AcceleratorHistory();
+
+  // Returns the most recent recorded accelerator.
+  const Accelerator& current_accelerator() const {
+    return current_accelerator_;
+  }
+
+  // Returns the most recent previously recorded accelerator that is different
+  // than the current.
+  const Accelerator& previous_accelerator() const {
+    return previous_accelerator_;
+  }
+
+  // Stores the given |accelerator| only if it's different than the currently
+  // stored one.
+  void StoreCurrentAccelerator(const Accelerator& accelerator);
+
+ private:
+  Accelerator current_accelerator_;
+  Accelerator previous_accelerator_;
+
+  DISALLOW_COPY_AND_ASSIGN(AcceleratorHistory);
+};
+
+}; // namespace ui
+
+#endif  // UI_BASE_ACCELERATORS_ACCELERATOR_HISTORY_H_