Add paper-menu-button and its dependencies to third_party/polymer

third_party/polymer/v1_0/components-chromium/paper-menu-button/paper-menu-button-animations-extracted.js

+
+  Polymer({
+    is: 'paper-menu-grow-height-animation',
+
+    behaviors: [
+      Polymer.NeonAnimationBehavior
+    ],
+
+    configure: function(config) {
+      var node = config.node;
+      var rect = node.getBoundingClientRect();
+      var height = rect.height;
+
+      this._effect = new KeyframeEffect(node, [{
+        height: (height / 2) + 'px'
+      }, {
+        height: height + 'px'
+      }], this.timingFromConfig(config));
+
+      return this._effect;
+    }
+  });
+
+  Polymer({
+    is: 'paper-menu-grow-width-animation',
+
+    behaviors: [
+      Polymer.NeonAnimationBehavior
+    ],
+
+    configure: function(config) {
+      var node = config.node;
+      var rect = node.getBoundingClientRect();
+      var width = rect.width;
+
+      this._effect = new KeyframeEffect(node, [{
+        width: (width / 2) + 'px'
+      }, {
+        width: width + 'px'
+      }], this.timingFromConfig(config));
+
+      return this._effect;
+    }
+  });
+
+  Polymer({
+    is: 'paper-menu-shrink-width-animation',
+
+    behaviors: [
+      Polymer.NeonAnimationBehavior
+    ],
+
+    configure: function(config) {
+      var node = config.node;
+      var rect = node.getBoundingClientRect();
+      var width = rect.width;
+
+      this._effect = new KeyframeEffect(node, [{
+        width: width + 'px'
+      }, {
+        width: width - (width / 20) + 'px'
+      }], this.timingFromConfig(config));
+
+      return this._effect;
+    }
+  });
+
+  Polymer({
+    is: 'paper-menu-shrink-height-animation',
+
+    behaviors: [
+      Polymer.NeonAnimationBehavior
+    ],
+
+    configure: function(config) {
+      var node = config.node;
+      var rect = node.getBoundingClientRect();
+      var height = rect.height;
+      var top = rect.top;
+
+      this.setPrefixedProperty(node, 'transformOrigin', '0 0');
+
+      this._effect = new KeyframeEffect(node, [{
+        height: height + 'px',
+        transform: 'translateY(0)'
+      }, {
+        height: height / 2 + 'px',
+        transform: 'translateY(-20px)'
+      }], this.timingFromConfig(config));
+
+      return this._effect;
+    }
+  });