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inspector: added NodeRuntime domain

Rodrigo Muino Tomonari requested to merge github/fork/alexkozy/node-runtime-agent-2 into master

Historically Node process sends Runtime.executionContextDestroyed with main context as argument when it is finished. This approach has some disadvantages. V8 prevents running some protocol command on destroyed contexts, e.g. Runtime.evaluate will return an error or Debugger.enable won't return a list of scripts. Both command might be useful for different tools, e.g. tool runs Profiler.startPreciseCoverage and at the end of node process it would like to get list of all scripts to match data to source code. Or some tooling frontend would like to provide capabilities to run commands in console when node process is finished to allow user to inspect state of the program at exit. This PR adds new domain: NodeRuntime. This domain sends NodeRuntime.waitingForDisconnect when this event is enabled.

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • commit message follows commit guidelines

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