Update manifest-background-color.js

Author: paulirish

lighthouse-core/audits/manifest-background-color.js

@@ -37,7 +37,7 @@ class ManifestBackgroundColor extends Audit {
    * @param {!Manifest=} manifest
    * @return {boolean}
    */
-  static hasBackgroundColorValue(manifest) {
+  static getBackgroundColorValue(manifest) {
     return manifest !== undefined &&
       manifest.background_color !== undefined &&
       manifest.background_color.value;
@@ -48,7 +48,7 @@ class ManifestBackgroundColor extends Audit {
    * @return {!AuditResult}
    */
   static audit(artifacts) {
-    const bgColor = ManifestBackgroundColor.hasBackgroundColorValue(artifacts.Manifest.value);
+    const bgColor = ManifestBackgroundColor.getBackgroundColorValue(artifacts.Manifest.value);
 
     return ManifestBackgroundColor.generateAuditResult({
       rawValue: !!bgColor,