Revert 181896

ash/system/chromeos/network/network_icon_animation.cc

Index: ash/system/chromeos/network/network_icon_animation.cc
===================================================================
--- ash/system/chromeos/network/network_icon_animation.cc	(revision 181898)
+++ ash/system/chromeos/network/network_icon_animation.cc	(working copy)
@@ -48,6 +48,17 @@
     animation_.Stop();
 }
 
+void NetworkIconAnimation::AddNetwork(const std::string& network_id) {
+  networks_.insert(network_id);
+  // Animation will start (if stopped) when GetAnimation is called.
+}
+
+void NetworkIconAnimation::RemoveNetwork(const std::string& network_id) {
+  networks_.erase(network_id);
+  if (networks_.empty())
+    animation_.Reset();
+}
+
 // static
 NetworkIconAnimation* NetworkIconAnimation::GetInstance() {
   static NetworkIconAnimation* s_icon_animation =