Since PRESUBMIT.py began insisting on formatting tree-wide, even changes in third_party are now raising this PRESUBMIT warning:

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Running presubmit upload checks ...

** Presubmit Warnings **
The src directory requires source formatting. Please run git cl format .

Presubmit checks took 4.6s to calculate.

There were presubmit warnings. Are you sure you wish to continue? (y/N): 
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It is inappropriate to insist on any particular formatting in third_party. This check is misleading people into thinking that they should be adapting code in third_party to Chrome’s conventions, when in fact it’s far more important to leave it alone so that it can easily be diffed against upstream and updated in the future.