Run yarn approve-api

Author: gioragutt

tools/public_api_guard/material/chips.d.ts

@@ -152,6 +152,7 @@ export declare class MatChipList extends _MatChipListMixinBase implements MatFor
     _blur(): void;
     _focusInput(options?: FocusOptions): void;
     _keydown(event: KeyboardEvent): void;
+    _keyup(event: KeyboardEvent): void;
     _markAsTouched(): void;
     _setSelectionByValue(value: any, isUserInput?: boolean): void;
     protected _updateFocusForDestroyedChips(): void;