Use ash NetworkIconAnimation in NetworkMenuIcon code

ash/system/chromeos/network/network_icon_animation.cc

Index: ash/system/chromeos/network/network_icon_animation.cc
diff --git a/ash/system/chromeos/network/network_icon_animation.cc b/ash/system/chromeos/network/network_icon_animation.cc
new file mode 100644
index 0000000000000000000000000000000000000000..55cc7f03c53346da50abedc5f7bac354dbb781cc
--- /dev/null
+++ b/ash/system/chromeos/network/network_icon_animation.cc
@@ -0,0 +1,59 @@
+// 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.
+
+#include "ash/system/chromeos/network/network_icon_animation.h"
+
+#include "ash/system/chromeos/network/network_icon_animation_observer.h"
+
+namespace {
+const int kThrobDurationMs = 750;  // Animation cycle length.
+}
+
+namespace ash {
+namespace network_icon {
+
+NetworkIconAnimation::NetworkIconAnimation()
+    : ALLOW_THIS_IN_INITIALIZER_LIST(animation_(this)) {
+  // Set up the animation throbber.
+  animation_.SetThrobDuration(kThrobDurationMs);
+  animation_.SetTweenType(ui::Tween::LINEAR);
+}
+
+NetworkIconAnimation::~NetworkIconAnimation() {
+}
+
+void NetworkIconAnimation::AnimationProgressed(const ui::Animation* animation) {

[tfarina, 2013/02/20 02:48:48]

the order of this definition does not match the order declared in the header
file.

+  if (animation != &animation_)
+    return;
+  FOR_EACH_OBSERVER(AnimationObserver, observers_, NetworkIconChanged());
+}
+
+double NetworkIconAnimation::GetAnimation() {
+  if (!animation_.is_animating()) {
+    animation_.Reset();
+    animation_.StartThrobbing(-1 /*throb indefinitely*/);
+    return 0;
+  }
+  return animation_.GetCurrentValue();
+}
+
+void NetworkIconAnimation::AddObserver(AnimationObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void NetworkIconAnimation::RemoveObserver(AnimationObserver* observer) {
+  observers_.RemoveObserver(observer);
+  if (observers_.size() == 0)
+    animation_.Stop();
+}
+
+// static
+NetworkIconAnimation* NetworkIconAnimation::GetInstance() {
+  static NetworkIconAnimation* s_icon_animation =
+      new NetworkIconAnimation();
+  return s_icon_animation;
+}
+
+}  // namespace network_icon
+}  // namespace ash