PolyGerrit: Add support for "Included In"

Bug: Issue 6112
Change-Id: I033e3f248a404813b5bc46eeef6bf25b7153bc1a

polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.html

@@ -80,6 +80,12 @@ limitations under the License.
       .downloadContainer {
         margin-right: 16px;
       }
+      .includedInContainer {
+        margin-right: 16px;
+      }
+      .includedInContainer.hide {
+        display: none;
+      }
       .rightControls {
         align-self: flex-end;
         margin: auto 0 auto auto;
@@ -209,6 +215,11 @@ limitations under the License.
               class="download"
               on-tap="_handleDownloadTap">Download</gr-button>
         </span>
+        <span class$="includedInContainer [[_hideIncludedIn(change)]] desktop">
+          <gr-button link
+              class="includedIn"
+              on-tap="_handleIncludedInTap">Included In</gr-button>
+        </span>
         <template is="dom-if"
             if="[[_fileListActionsVisible(shownFileCount, _maxFilesForBulkActions)]]">
           <gr-button

polygerrit-ui/app/elements/change/gr-file-list-header/gr-file-list-header.js

@@ -179,6 +179,11 @@
       this.fire('open-diff-prefs');
     },
 
+    _handleIncludedInTap(e) {
+      e.preventDefault();
+      this.fire('open-included-in-dialog');
+    },
+
     _handleDownloadTap(e) {
       e.preventDefault();
       this.fire('open-download-dialog');
@@ -199,5 +204,9 @@
     _getRevisionInfo(change) {
       return new Gerrit.RevisionInfo(change);
     },
+
+    _hideIncludedIn(change) {
+      return change && change.status === 'MERGED' ? '' : 'hide';
+    },
   });
 })();