eslint: Enforce no-prototype-builtins

Change-Id: I4244f0576e48c233d24533b45a28c07b2531d6da

.eslintrc.json

@@ -18,7 +18,6 @@
 		"OO": "readonly"
 	},
 	"rules": {
-		"no-prototype-builtins": "off",
 		"no-use-before-define": "off",
 		"template-curly-spacing": "off"
 	}

src/container.js

@@ -41,7 +41,7 @@ export default function createContainer() {
 		 *  `false`
 		 */
 		has( name ) {
-			return factories.hasOwnProperty( name );
+			return Object.prototype.hasOwnProperty.call( factories, name );
 		},
 
 		/**
@@ -82,7 +82,7 @@ export default function createContainer() {
 				return factory;
 			}
 
-			if ( !cache.hasOwnProperty( name ) ) {
+			if ( !Object.prototype.hasOwnProperty.call( cache, name ) ) {
 				cache[ name ] = factories[ name ]( this );
 			}
 

src/reducers/nextState.js

@@ -20,15 +20,16 @@
  */
 export default function nextState( state, updates ) {
 	const result = {};
+	const hasOwn = Object.prototype.hasOwnProperty;
 
 	for ( const key in state ) {
-		if ( state.hasOwnProperty( key ) && !updates.hasOwnProperty( key ) ) {
+		if ( hasOwn.call( state, key ) && !hasOwn.call( updates, key ) ) {
 			result[ key ] = state[ key ];
 		}
 	}
 
 	for ( const key in updates ) {
-		if ( updates.hasOwnProperty( key ) ) {
+		if ( hasOwn.call( updates, key ) ) {
 			result[ key ] = updates[ key ];
 		}
 	}

src/title.js

@@ -54,7 +54,7 @@ export function getTitle( href, config ) {
 		} catch ( e ) {
 			// Will return undefined below
 		}
-	} else if ( queryLength === 1 && linkHref.query.hasOwnProperty( 'title' ) ) {
+	} else if ( queryLength === 1 && 'title' in linkHref.query ) {
 		// URL is not pretty, but only has a `title` parameter
 		title = linkHref.query.title;
 	}