[ dart:io ] Fix bad type casts in network_profiling.dart In 32e45cf30031dd2466eaedbf5d98c457eff1bb61, types were updated from Map<String, dynamic> to Map<String, Object> in some situations. These two aren't compatible and can lead to runtime type cast failures. This change fixes these cast failures and adds a regression test. Fixes https://github.com/dart-lang/sdk/issues/63156 CoreLibraryReviewExempt: Only internal dart:io details. Change-Id: I6684d447fc2fe98f9d54fb5bebc3e67f225fe5c8 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/494680 Reviewed-by: Samuel Rawlins <srawlins@google.com> Reviewed-by: Elliott Brooks <elliottbrooks@google.com> Commit-Queue: Ben Konyi <bkonyi@google.com>
Dart is:
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