Add UI to filter fuzzes based on tags.

fuzzer/res/imp/fuzzer-stacktrace-sk.html

 <!--
   This in an HTML Import-able file that contains the definition
   of the following elements:
 
     <fuzzer-stacktrace-sk>
 
   <fuzzer-stacktrace-sk> displays a strack trace showing the first 8 frames and can be expanded with a click.
 
   To use this file import it:
 
@@ skipping 65 matching lines @@
       }
     </style>
     <div class="stacktrace">
       <template is="dom-repeat" items="{{frames}}" as="frame">
           <div class="frame" >
             <span class="line">
               <a target="_blank" href$="{{_computeCSLink(frame)}}">{{frame.packageName}}{{frame.fileName}}:{{frame.lineNumber}}
               </a>
             </span>
             <span class="function-name">
-              <template is="dom-if" if="{{frame.functionName}}">
                 <span>{{frame.functionName}}</span>
-              </template>
             </span>
           </div>
       </template>
 
     <paper-icon-button id="expand" icon="icons:more-horiz" on-click="showMore" title="expand stacktrace" class$="{{icon_classes}}"></paper-icon-button>
 
     </div>
   </template>
 
   <script>
@@ skipping 43 matching lines @@
       _computeCSLink: function(frame) {
         return "https://code.google.com/p/chromium/codesearch#chromium/src/third_party/skia/" + frame.packageName + frame.fileName +"&l="+frame.lineNumber;
       },
 
       showMore: function() {
         this.expanded = true;
       }
     });
   </script>
 </dom-module>