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diff --git a/chromium/ui/wm/core/base_focus_rules.h b/chromium/ui/wm/core/base_focus_rules.h
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+++ b/chromium/ui/wm/core/base_focus_rules.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 UI_WM_CORE_BASE_FOCUS_RULES_H_
+#define UI_WM_CORE_BASE_FOCUS_RULES_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/wm/core/focus_rules.h"
+
+namespace wm {
+
+// A set of basic focus and activation rules. Specializations should most likely
+// subclass this and call up to these methods rather than reimplementing them.
+class WM_EXPORT BaseFocusRules : public FocusRules {
+ protected:
+  BaseFocusRules();
+  virtual ~BaseFocusRules();
+
+  // Returns true if the children of |window| can be activated.
+  virtual bool SupportsChildActivation(aura::Window* window) const = 0;
+
+  // Returns true if |window| is considered visible for activation purposes.
+  virtual bool IsWindowConsideredVisibleForActivation(
+      aura::Window* window) const;
+
+  // Overridden from FocusRules:
+  virtual bool IsToplevelWindow(aura::Window* window) const OVERRIDE;
+  virtual bool CanActivateWindow(aura::Window* window) const OVERRIDE;
+  virtual bool CanFocusWindow(aura::Window* window) const OVERRIDE;
+  virtual aura::Window* GetToplevelWindow(aura::Window* window) const OVERRIDE;
+  virtual aura::Window* GetActivatableWindow(
+      aura::Window* window) const OVERRIDE;
+  virtual aura::Window* GetFocusableWindow(aura::Window* window) const OVERRIDE;
+  virtual aura::Window* GetNextActivatableWindow(
+      aura::Window* ignore) const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BaseFocusRules);
+};
+
+}  // namespace wm
+
+#endif  // UI_WM_CORE_BASE_FOCUS_RULES_H_