Add UI to filter fuzzes based on tags.

res/js/common.js

 /**
  * common.js is a set of common functions used across all of skiaperf.
  *
  * Everything is scoped to 'sk' except $$ and $$$ which are global since they
  * are used so often.
  *
  */
 
 /**
  * $$ returns a real JS array of DOM elements that match the CSS query selector.
@@ skipping 655 matching lines @@
   sk.escapeHTML = function(s) {
     return s.replace(/&/g, '&')
     .replace(/</g, '&lt;')
     .replace(/>/g, '&gt;')
     .replace(/"/g, '&quot;')
     .replace(/'/g, '&#x27;')
     .replace(/\//g, '&#x2F;');
 
   }
 
+  // Returns true if the sorted arrays a and b
+  // contain at least one element in common
+  sk.sharesElement = function(a, b) {
+    var i = 0;
+    var j = 0;
+    while (i < a.length && j < b.length) {
+      if (a[i] < b[j]) {
+        i++;
+      } else if (b[j] < a[i]) {
+        j++;
+      } else {
+        return true;
+      }
+    }
+    return false;
+  }
+
   // Polyfill for String.startsWith from
   // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith#Polyfill
   // returns true iff the string starts with the given prefix
   if (!String.prototype.startsWith) {
     String.prototype.startsWith = function(searchString, position) {
       position = position || 0;
       return this.indexOf(searchString, position) === position;
     };
   }
 
   return sk;
 }();