Change TabButton to be OnPush as it is used in an OnPush context, and there is no reason why it can't be OnPush.

TedSander · nshahan · commit fdce791c1fac · 2019-04-15T15:42:30.000-07:00
PiperOrigin-RevId: 242756270
diff --git a/angular_components/lib/material_tab/tab_button.dart b/angular_components/lib/material_tab/tab_button.dart
@@ -19,6 +19,7 @@ import 'package:angular_components/material_tab/tab_mixin.dart';
           <material-ripple></material-ripple>
         ''',
   styleUrls: ['tab_button.scss.css'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
   directives: [MaterialRippleComponent],
 )
 class TabButtonComponent extends MaterialButtonBase with TabMixin {

Original file line number	Diff line number	Diff line change
`@@ -19,6 +19,7 @@ import 'package:angular_components/material_tab/tab_mixin.dart';`
`19`	`19`	`<material-ripple></material-ripple>`
`20`	`20`	`''',`
`21`	`21`	`styleUrls: ['tab_button.scss.css'],`
	`22`	`+ changeDetection: ChangeDetectionStrategy.OnPush,`
`22`	`23`	`directives: [MaterialRippleComponent],`
`23`	`24`	`)`
`24`	`25`	`class TabButtonComponent extends MaterialButtonBase with TabMixin {`