Fix internal type-check errors.

Release-Notes: skip
Change-Id: I29d7f35fe7d1f4155b555c38e75a4d1f0da7abfa
diff --git a/polygerrit-ui/app/elements/settings/gr-cla-view/gr-cla-view.ts b/polygerrit-ui/app/elements/settings/gr-cla-view/gr-cla-view.ts
index fb7fb64..db8a008 100644
--- a/polygerrit-ui/app/elements/settings/gr-cla-view/gr-cla-view.ts
+++ b/polygerrit-ui/app/elements/settings/gr-cla-view/gr-cla-view.ts
@@ -233,7 +233,7 @@
     return url;
   }
 
-  private handleShowAgreement = (e: Event) => {
+  private readonly handleShowAgreement = (e: Event) => {
     this.agreementName = (e.target as HTMLInputElement).getAttribute(
       'data-name'
     )!;
@@ -242,7 +242,7 @@
     this.showAgreements = true;
   };
 
-  private handleSaveAgreements = () => {
+  private readonly handleSaveAgreements = () => {
     this.createToast('Agreement saving...');
 
     const name = this.agreementName;
@@ -290,7 +290,7 @@
     );
   }
 
-  private handleBindValueChanged = (e: BindValueChangeEvent) => {
+  private readonly handleBindValueChanged = (e: BindValueChangeEvent) => {
     this.agreementsText = e.detail.value;
   };
 }