Allow focus to be sent between browser window and launcher/status window

ash/focus_cycler.h

Index: ash/focus_cycler.h
diff --git a/ash/focus_cycler.h b/ash/focus_cycler.h
new file mode 100644
index 0000000000000000000000000000000000000000..dfdf7e5c4a268921ce2ed10392dd6658d0da8d1a
--- /dev/null
+++ b/ash/focus_cycler.h
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+// Copyright (c) 2012 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 FOCUS_CYCLER_H_
+#define FOCUS_CYCLER_H_
+#pragma once
+
+#include <vector>
+
+#include "base/compiler_specific.h"
+#include "ui/base/accelerators/accelerator.h"
+
+namespace views {
+class Widget;
+}  // namespace views
+
+namespace ash {
+
+namespace internal {
+
+// This class handles moving focus between a set of widgets and the main browser
+// window.
+class FocusCycler : public ui::AcceleratorTarget {
+ public:
+  enum Direction {
+    FORWARD,
+    BACKWARD
+  };
+
+  FocusCycler();
+  virtual ~FocusCycler();
+
+  // Add a widget to the focus cycle and set up accelerators.  The widget needs
+  // to have an AccessiblePaneView as the content view.
+  void AddWidget(views::Widget* widget);
+
+  // Move focus to the next widget.
+  void RotateFocus(Direction direction);
+
+  // ui::AcceleratorTarget overrides
+  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
+  virtual bool CanHandleAccelerators() const OVERRIDE;
+
+ private:
+  std::vector<views::Widget*> widgets_;
+
+  DISALLOW_COPY_AND_ASSIGN(FocusCycler);
+};
+
+}  // namespace internal
+
+}  // namespace ash
+
+#endif  // FOCUS_CYCLER_H_