Only show size bar in file list header if pref is enabled

Release-Notes: skip
Google-bug-id: b/261139479
Change-Id: Ia875ecd9f3a7aa27c2c10c29022a05b6b52df178

polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts

diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
index 00d5a8c..071c489 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list.ts
@@ -955,7 +955,10 @@
       <div class="path" role="columnheader">File</div>
       <div class="comments desktop" role="columnheader">Comments</div>
       <div class="comments mobile" role="columnheader" title="Comments">C</div>
-      <div class="sizeBars desktop" role="columnheader">Size</div>
+      ${when(
+        this.showSizeBars,
+        () => html`<div class="sizeBars desktop" role="columnheader">Size</div>`
+      )}
       <div class="header-stats" role="columnheader">Delta</div>
       <!-- endpoint: change-view-file-list-header -->
       ${when(showDynamicColumns, () => this.renderDynamicHeaderEndpoints())}

polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.ts

diff --git a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.ts b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.ts
index 66f1e57..1fbddc5 100644
--- a/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.ts
+++ b/polygerrit-ui/app/elements/change/gr-file-list/gr-file-list_test.ts
@@ -113,6 +113,7 @@
         .stub(element, '_saveReviewedState')
         .callsFake(() => Promise.resolve());
       await element.updateComplete;
+      element.showSizeBars = true;
       // Wait for expandedFilesChanged to complete.
       await waitEventLoop();
     });
@@ -205,7 +206,7 @@
             </div>
           </div>
           <div class="desktop" role="gridcell">
-            <div aria-hidden="true" class="hide sizeBars"></div>
+            <div aria-hidden="true" class="sizeBars"></div>
           </div>
           <div class="stats" role="gridcell">
             <div>