[dart2js] Fix protobuf shaking algorithm. - Reorganize conditional impacts/uses so that unused impacts only overwrite nodes that no other member condition is satisfying. - Use `isMemberProcessed` instead of `isLiveInstanceMember` since some member conditions might be static members. - Update deferred load algorithm to account for conditional uses. Change-Id: I53ce6d283c5b79e0a7c9e7562fdcfe744e37bbc7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/352180 Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
Dart is:
Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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