introduce web_components pkg for consolidated polyfills

pkg/web_components/lib/platform.js

Index: pkg/web_components/lib/platform.js
diff --git a/pkg/web_components/lib/platform.js b/pkg/web_components/lib/platform.js
new file mode 100644
index 0000000000000000000000000000000000000000..bb46f76f7c5f5e1e380680b5ef671694cdf764ac
--- /dev/null
+++ b/pkg/web_components/lib/platform.js
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 The Polymer Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// @version: 0.1.4-3d161da
+function PointerGestureEvent(a,b){var c=b||{},d=document.createEvent("Event"),e={bubbles:Boolean(c.bubbles)===c.bubbles||!0,cancelable:Boolean(c.cancelable)===c.cancelable||!0};d.initEvent(a,e.bubbles,e.cancelable);for(var f,g=Object.keys(c),h=0;h<g.length;h++)f=g[h],d[f]=c[f];return d.preventTap=this.preventTap,d}"undefined"==typeof WeakMap&&!function(){var a=Object.defineProperty,b=Date.now()%1e9,c=function(){this.name="__st"+(1e9*Math.random()>>>0)+(b++ +"__")};c.prototype={set:function(b,c){var d=b[this.name];d&&d[0]===b?d[1]=c:a(b,this.name,{value:[b,c],writable:!0})},get:function(a){var b;return(b=a[this.name])&&b[0]===a?b[1]:void 0},"delete":function(a){this.set(a,void 0)}},window.WeakMap=c}(),function(a){"use strict";function b(){function a(a){b=a}if("function"!=typeof Object.observe||"function"!=typeof Array.observe)return!1;var b=[],c={};if(Object.observe(c,a),c.id=1,c.id=2,delete c.id,Object.deliverChangeRecords(a),3!==b.length)return!1;if("new"==b[0].type&&"updated"==b[1].type&&"deleted"==b[2].type)L="new",M="updated",N="reconfigured",O="deleted";else if("add"!=b[0].type||"update"!=b[1].type||"delete"!=b[2].type)return console.error("Unexpected change record names for Object.observe. 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