[CP] [Windows] Fix headless mode crash

[loic-sharma]

issue_link

#116753

Commit Hash

flutter/engine@2148fc0

Target

beta

pr_link

flutter/engine#38233

Impacted Users

Windows developers that use headless mode.

Impact Description

Flutter Windows crashes immediately if it started in headless mode.

Workaround

Yes. The crash is caused due to incorrectly handling no Dart entry point. This can be circumvented by providing an empty entry point manually.

Risk

low

Test Coverage

yes

Validation Steps

Verify that a Windows Flutter app does not crash if it has no Dart entry point.

[itsjustkevin]

@HansMuller could you look at this cherry-pick?

[HansMuller]

LGTM but I think @cbracken is the right person to sign off. Chris?

[cbracken]

Yep, we definitely want this. LGTM.

[github-actions]

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