Don't hide assignee field.

ChromeOS makes extensive use of this field, and I'd like
Chromium to pick it up as well.

Bug: 687443
Change-Id: I3040aed80c2d406fe797799ed9b279f2ec63ac29
diff --git a/src/main/resources/static/chromium-style.html b/src/main/resources/static/chromium-style.html
index d2ffbd1..60dc9a9 100644
--- a/src/main/resources/static/chromium-style.html
+++ b/src/main/resources/static/chromium-style.html
@@ -42,9 +42,6 @@
 <dom-module id="chromium-style-change-metadata">
   <style>
     html {
-      --change-metadata-assignee: {
-        display: none;
-      }
       --change-metadata-label-status: {
         display: none;
       }