[record_use] Completeness: dart2js: share tests expectations with the vm

[dcharkes]

To ensure proper feature parity, we should share the test expectations between dart2js and the VM.

Blocked by:

• [record_use] Implementation: Semantic equality for RecordedUses for testing #2897
• [record_use] Completeness: dart2js: Change the input to use @RecordUse #2882
• [record_use] Completeness: dart2js: named arguments #2883
• [record_use] Completeness: dart2js: const instance source locations #2884
• [record_use] Completeness: dart2js: Instances #2893
• [record_use] Completeness: dart2js: Definition loading unit missing #2890
• [record_use] Completeness: dart2js: enum values #2894
• [record_use] Completeness: dart2js: tearoffs #2895
• [record_use] Completeness: dart2js: const map and list arguments #2896
• [record_use] Correctness: Non-obvious const argument values (differences between backends) #2889
• [record_use] Correctness: Specify what uris are used #2891
• [record_use] Correctness: loadDeferredLibrary outside dart2js #2892