[Perf] regression in unknown_processes:reported_by_chrome:partition_alloc:max_allocated_size at v1.63.18

[atuchin-m]

Revision range: brave/brave-core@v1.63.14...v1.63.18
Win 11, mac x64 & arm64
https://brave-perf-dashboard.appspot.com/report?sid=75b4dd3a56c456c0308ecd167a0e918acbae731ecce756a6ecbaeae808a9bc75

[atuchin-m]

There also a regression in reported_by_chrome:allocated_objects_size, not just max_allocated_size
https://brave-perf-dashboard.appspot.com/report?sid=88b1722134def223fcd8b280d258b77003d94dd5a0ac1d29d3827c46d34e595d

[atuchin-m]

It's a regression, detected on the old revisions after enabling anomaly detector.
The reason is bumping WDP: brave/brave-core#20961

It turns out that WDP consumes CPU and memory even it's explicitly disabled in the settings.
IMHO it isn't good for the end users and should be fixed.

[kjozwiak]

@atuchin-m assuming the above can be closed as brave/brave-core#22756 is also in 1.66.x? Should the above be labelled as QA/Yes? If so, mind adding some STR/Cases? If this is something the performance team has already checked/verified, we can label as QA/No and close it off.

[atuchin-m]

The performance fix was verified by the dashboard.
As for WDP @remusao checked thay it's good for nighty.
So I'm adding QA/No.