Create frontend compiler in `flutter test` lazily. (#15251)

* Create frontend compiler in `flutter test` lazily. This is needed to avoid unwarranted runtime dependencies on Artifacts, for example when in non-preview-dart-2 mode. Refactor the compilation-related code into _Compiler class.

Create frontend compiler in `flutter test` lazily. (#15251)
* Create frontend compiler in `flutter test` lazily. This is needed to avoid unwarranted runtime dependencies on Artifacts, for example when in non-preview-dart-2 mode. Refactor the compilation-related code into _Compiler class.
1087279a · Alexander Aprelev · GitHub · 1a3c9b83 · 1087279a
Unverified Commit 1087279a authored Mar 08, 2018 by Alexander Aprelev Committed by GitHub Mar 08, 2018
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flutter_platform.dart packages/flutter_tools/lib/src/test/flutter_platform.dart +118 -94

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--- a/packages/flutter_tools/lib/src/test/flutter_platform.dart
+++ b/packages/flutter_tools/lib/src/test/flutter_platform.dart