Replace <link rel="import"> with <import>

sky/framework/sky-element/TemplateBinding.sky

 <!--
 // Copyright 2014 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.
 -->
-<link rel="import" href="observe.sky" as="observe" />
+<import src="observe.sky" as="observe" />
 
 <script>
 Node.prototype.bind = function(name, observable, oneTime) {
   var self = this;
 
   if (oneTime) {
     this[name] = observable;
     return;
   }
 
@@ skipping 978 matching lines @@
       this.closeInstanceBindings(this.instances[i]);
     }
 
     this.instances.length = 0;
     this.closeDeps();
     this.templateElement_.iterator_ = undefined;
     this.closed = true;
   }
 };
 </script>