Add UI to filter fuzzes based on tags.

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

Index: fuzzer/res/imp/fuzzer-menu-sk.html
diff --git a/fuzzer/res/imp/fuzzer-menu-sk.html b/fuzzer/res/imp/fuzzer-menu-sk.html
index 6ad2478ed973e4d0e58af6cea1c0a754d5a2e7f9..05fffddd8245e77c0bd24f6d1b3a4fe4da14f53c 100644
--- a/fuzzer/res/imp/fuzzer-menu-sk.html
+++ b/fuzzer/res/imp/fuzzer-menu-sk.html
@@ -30,6 +30,8 @@
     <menu-item-sk label="Home" url="/" icon="icons:home"></menu-item-sk>
     <menu-item-sk label="Help" url="https://docs.google.com/document/d/1FZZnfEXzuNcjshveX1R35Lp-96-iLJWibNYZ7_WgZjg/edit" icon="icons:help"></menu-item-sk>
     <menu-item-sk label="Code" url="https://github.com/google/skia-buildbot/tree/master/fuzzer" icon="icons:folder"></menu-item-sk>
+
+    <content></content>
   </template>
   <script>
     Polymer({is: "fuzzer-menu-sk"});