DataTransfer: Generalized refactoring (range-based for loops, function logic)

- range-based for loops
- spelling
- simplifying function logic

Bug: 896479
Change-Id: I32d703d5f2aacb163bf6818d3dc0abf993f06b95
Reviewed-on: https://chromium-review.googlesource.com/c/1341145
Reviewed-by: Victor Costan <pwnall@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614909}
3 files changed