Delete proxy and total samples, which have bit-rotted.

samples/total/client/HtmlUtils.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-class HtmlUtils {
-
-  // Strips the 'px' (pixels) suffix from a string CSS value and parses the
-  // result as an integer.
-  static int fromPx(String px) => Math.parseInt(px.substring(0, px.length - 2));
-
-  // Workaround until String.replaceAll is functional
-  static String quoteHtml(String s) {
-    StringBuffer sb = new StringBuffer();
-    int last = 0;
-    for (int i = 0; i < s.length; i++) {
-      switch (s[i]) {
-      case "<":
-        sb.add(s.substring(last, i));
-        sb.add("&lt;");
-        last = i + 1;
-        break;
-      case ">":
-        sb.add(s.substring(last, i));
-        sb.add("&gt;");
-        last = i + 1;
-        break;
-      case "&":
-        sb.add(s.substring(last, i));
-        sb.add("&amp;");
-        last = i + 1;
-        break;
-      case "\"":
-        sb.add(s.substring(last, i));
-        sb.add("&quot;");
-        last = i + 1;
-        break;
-      }
-    }
-    sb.add(s.substring(last, s.length));
-    return sb.toString();
-  }
-
-  static void setIntegerProperty(Element element, String property, int value, String units) {
-    element.style.setProperty(property, "${value}${units}", "");
-  }
-
-  // Appends 'px' (pixels) to an integer for use in CSS values.
-  static String toPx(int length) => "${length}px";
-}