Nicer import of chrome-trace profiles generated by gradle-profiler.

[fqueze]

gradle-profiler can generate profiles in the chrome-trace format, that we can import.

Here's an example profile using our current importer: https://share.firefox.dev/3Q4P7g0

Same profile imported with the PR applied: https://share.firefox.dev/3EplC5N

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 4 lines in your changes missing coverage. Please review.

Project coverage is 85.83%. Comparing base (7f30744) to head (b992f12).
Report is 320 commits behind head on main.

Files with missing lines	Patch %	Lines
src/profile-logic/import/chrome.js	71.42%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5360      +/-   ##
==========================================
- Coverage   85.84%   85.83%   -0.01%     
==========================================
  Files         312      312              
  Lines       29827    29835       +8     
  Branches     8213     8215       +2     
==========================================
+ Hits        25605    25610       +5     
- Misses       3627     3630       +3     
  Partials      595      595              

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