The Java wrapper around PersonalDataManager has tons of code that doesn't actually map to anything in CPP land. Compare:

https://cs.chromium.org/chromium/src/chrome/android/java/src/org/chromium/chrome/browser/autofill/PersonalDataManager.java

vs.

https://cs.chromium.org/chromium/src/components/autofill/core/browser/personal_data_manager.h?q=personal_data_manager&dr=CSs

The irrelevant code should be moved into a util--or combined with CPP equivalents where possible.