WebUI: Fix more violations of no-extra-semi lint rule.

chrome/browser/resources/chromeos/arc_support/background.js

Index: chrome/browser/resources/chromeos/arc_support/background.js
diff --git a/chrome/browser/resources/chromeos/arc_support/background.js b/chrome/browser/resources/chromeos/arc_support/background.js
index cece40fbe56cbc7746cd82ff5c8403d23f79f76e..09ebafd3b0df1372e4d870211cf71fdc57527ecf 100644
--- a/chrome/browser/resources/chromeos/arc_support/background.js
+++ b/chrome/browser/resources/chromeos/arc_support/background.js
@@ -132,7 +132,7 @@ class PreferenceCheckbox {
   onLearnMoreLinkClicked() {
     showTextOverlay(this.learnMoreContent_);
   }
-};
+}
 
 /**
  * Handles the checkbox action of metrics preference.
@@ -189,7 +189,7 @@ class MetricsPreferenceCheckbox extends PreferenceCheckbox {
     chrome.browser.openTab({'url': 'chrome://settings'}, function() {});
     event.preventDefault();
   }
-};
+}
 
 /**
  * Represents the page loading state.
@@ -397,7 +397,7 @@ class TermsOfServicePage {
   onLocationServicePreferenceChanged(isEnabled, isManaged) {
     this.locationServiceCheckbox_.onPreferenceChanged(isEnabled, isManaged);
   }
-};
+}
 
 /**
  * Applies localization for html content and sets terms webview.