DDC's sdk JS needs to be included in the sdk

[jmesserly]

it looks like maybe we could do this in utils/dartdevc/dartdevc.gyp, but I don't know how to do anything in GYP

[jmesserly]

@vsmenon any ideas here? we need to copy dart_library.js and dart_sdk.js so they're available and match the version of DDC in the DEPS file

[jmesserly]

btw, thanks to @nex3 for finding this :)

[vsmenon]

@jakemac53 @sigmundch

We should probably copy everything under lib/js.

[sigmundch]

2 ideas: you can put the files directly somewhere under sdk/_internal/* like we do with js_runtime for dart2js, or you can use gyp/GN to copy the files. The gyp/GN rule would be similar to what the analyzer folks did to generate strong.sum under the sdk. For example, see

sdk/utils/dartanalyzer/dartanalyzer.gyp

Line 51 in bb02e81

'action_name': 'generate_summary_strong',

[vsmenon]

Here's CL:

https://codereview.chromium.org/2416783005/

[nex3]

What's the intended process for users to find and use these sources?

[vsmenon]

See related in #27607