1 files changed, 48 insertions, 0 deletions
diff --git a/chromium/ash/system/chromeos/network/network_icon_animation.h b/chromium/ash/system/chromeos/network/network_icon_animation.h
new file mode 100644
index 00000000000..a34b80ed969
--- /dev/null
+++ b/chromium/ash/system/chromeos/network/network_icon_animation.h
@@ -0,0 +1,48 @@
+// Copyright (c) 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_SYSTEM_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_
+#define ASH_SYSTEM_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_
+
+#include <set>
+#include <string>
+
+#include "ash/ash_export.h"
+#include "base/observer_list.h"
+#include "ui/gfx/animation/animation_delegate.h"
+#include "ui/gfx/animation/throb_animation.h"
+
+namespace ash {
+namespace network_icon {
+
+class AnimationObserver;
+
+// Single instance class to handle icon animations and keep them in sync.
+class ASH_EXPORT NetworkIconAnimation : public gfx::AnimationDelegate {
+ public:
+  NetworkIconAnimation();
+  virtual ~NetworkIconAnimation();
+
+  // Returns the current animation value, [0-1].
+  double GetAnimation();
+
+  // The animation stops when all observers have been removed.
+  // Be sure to remove observers when no associated icons are animating.
+  void AddObserver(AnimationObserver* observer);
+  void RemoveObserver(AnimationObserver* observer);
+
+  // gfx::AnimationDelegate implementation.
+  virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
+
+  static NetworkIconAnimation* GetInstance();
+
+ private:
+  gfx::ThrobAnimation animation_;
+  ObserverList<AnimationObserver> observers_;
+};
+
+}  // namespace network_icon
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_CHROMEOS_NETWORK_NETWORK_ICON_ANIMATION_H_