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This CL just moves methods around on the header so it matches the order
in the implementation and viceversa, more cleaing/grouping is needed.

Bug: None
Test: Build.
Change-Id: I49084e9b868dedab1cf58cf90edc7caef5e72259
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568932
Auto-Submit: David Jacobo <djacobo@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: David Jacobo <djacobo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832632}