Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/polymer/src/standard/events-extracted.js

Index: third_party/polymer/v0_8/components-chromium/polymer/src/standard/events-extracted.js
diff --git a/third_party/polymer/v0_8/components-chromium/polymer/src/standard/events-extracted.js b/third_party/polymer/v0_8/components-chromium/polymer/src/standard/events-extracted.js
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index 0000000000000000000000000000000000000000..4f6a3e795cb77fe3d21fd945569c5e16d3f48f10
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+++ b/third_party/polymer/v0_8/components-chromium/polymer/src/standard/events-extracted.js
@@ -0,0 +1,84 @@
+
+
+  /**
+   * Supports `listeners` and `keyPresses` objects.
+   *
+   * Example:
+   *
+   *     using('Base', function(Base) {
+   *
+   *       Polymer({
+   *
+   *         listeners: {
+   *           // `click` events on the host are delegated to `clickHandler`
+   *           'click': 'clickHandler'
+   *         },
+   *
+   *         keyPresses: {
+   *           // 'ESC' key presses are delegated to `escHandler`
+   *           Base.ESC_KEY: 'escHandler'
+   *         },
+   *
+   *         ...
+   *
+   *       });
+   *
+   *     });
+   *
+   * @class standard feature: events
+   *
+   */
+
+  Polymer.Base._addFeature({
+
+    listeners: {},
+
+    _listenListeners: function(listeners) {
+      var node, name, key;
+      for (key in listeners) {
+        if (key.indexOf('.') < 0) {
+          node = this;
+          name = key;
+        } else {
+          name = key.split('.');
+          node = this.$[name[0]];
+          name = name[1];
+        }
+        this.listen(node, name, listeners[key]);
+      }
+    },
+
+    listen: function(node, eventName, methodName) {
+      var host = this;
+      var handler = function(e) {
+        if (host[methodName]) {
+          host[methodName](e, e.detail);
+        } else {
+          console.warn('[%s].[%s]: event handler [%s] is null in scope (%o)',
+            node.localName, eventName, methodName, host);
+        }
+      };
+      switch (eventName) {
+        case 'tap':
+        case 'track':
+          Polymer.Gestures.add(eventName, node, handler);
+          break;
+
+        default:
+          node.addEventListener(eventName, handler);
+          break;
+      }
+    },
+
+    keyCodes: {
+      ESC_KEY: 27,
+      ENTER_KEY: 13,
+      LEFT: 37,
+      UP: 38,
+      RIGHT: 39,
+      DOWN: 40,
+      SPACE: 32
+    }
+
+  });
+