Break apart view.ts into multiple files.

src/view/media-queries-classifier.ts

@@ -0,0 +1,15 @@
+import { EventMediaQueries, MediaQueries, RecordingMediaQueries } from './media-queries';
+
+export class MediaQueriesClassifier {
+  public static areEventQueries(
+    queries?: MediaQueries | null,
+  ): queries is EventMediaQueries {
+    return queries instanceof EventMediaQueries;
+  }
+
+  public static areRecordingQueries(
+    queries?: MediaQueries | null,
+  ): queries is RecordingMediaQueries {
+    return queries instanceof RecordingMediaQueries;
+  }
+}