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third_party/polymer/components/neon-animation/neon-animatable-behavior.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
 <link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="animations/opaque-animation.html">
 
 <script>
 
   /**
    * `Polymer.NeonAnimatableBehavior` is implemented by elements containing animations for use with
    * elements implementing `Polymer.NeonAnimationRunnerBehavior`.
    * @polymerBehavior
    */
   Polymer.NeonAnimatableBehavior = {
 
@@ skipping 21 matching lines @@
        */
       exitAnimation: {
         observer: '_exitAnimationChanged',
         type: String
       }
 
     },
 
     _entryAnimationChanged: function() {
       this.animationConfig = this.animationConfig || {};
-      if (this.entryAnimation !== 'fade-in-animation') {
-        // insert polyfill hack
-        this.animationConfig['entry'] = [{
-          name: 'opaque-animation',
-          node: this
-        }, {
-          name: this.entryAnimation,
-          node: this
-        }];
-      } else {
-        this.animationConfig['entry'] = [{
-          name: this.entryAnimation,
-          node: this
-        }];
-      }
+      this.animationConfig['entry'] = [{
+        name: this.entryAnimation,
+        node: this
+      }];
     },
 
     _exitAnimationChanged: function() {
       this.animationConfig = this.animationConfig || {};
       this.animationConfig['exit'] = [{
         name: this.exitAnimation,
         node: this
       }];
     },
 
@@ skipping 74 matching lines @@
       // append the configurations saved in the map to the array
       for (var key in map) {
         allConfigs.push(map[key]);
       }
       return allConfigs;
     }
 
   };
 
 </script>