test(cdk/layout): fix test failure

Fixes a test failure that seems to have snuck into master because of #23571.

Author: crisbeto

src/cdk/layout/media-matcher.spec.ts

@@ -21,14 +21,14 @@ describe('MediaMatcher', () => {
     expect(mediaMatcher.matchMedia('(max-width: 1px)').matches).toBeFalsy();
   });
 
-  it('should add CSS rules for provided queries when the platform is webkit',
+  it('should add CSS rules for provided queries when the platform is webkit or blink',
     inject([Platform], (platform: Platform) => {
       const randomWidth = `${Math.random()}px`;
 
       expect(getStyleTagByString(randomWidth)).toBeFalsy();
       mediaMatcher.matchMedia(`(width: ${randomWidth})`);
 
-      if (platform.WEBKIT) {
+      if (platform.WEBKIT || platform.BLINK) {
         expect(getStyleTagByString(randomWidth)).toBeTruthy();
       } else {
         expect(getStyleTagByString(randomWidth)).toBeFalsy();