Identifiers in Blink now largely follow the standard Chrome style
conventions, with several additional rules:
- web-exposed methods remain namedLikeThis() for consistency with
  Javascript bindings.
- method names are never named_in_hacker_case()
- enumerator names are kNamedLikeThis.

This commit was generated by the following process.
1. Running //tools/clang/rewrite_to_chrome_style across the codebase.
2. Apply manual fixes.
3. git cl format

BUG=578344
R=lukasza@chromium.org
TBR=darin@chromium.org

Change-Id: Ide5d397d3c6a5d973fd0a6f81dccf82561d4bb71
Reviewed-on: https://chromium-review.googlesource.com/472192


Reviewed-by: Blink Reformat <blink-reformat@chromium.org>
Cr-Commit-Position: refs/heads/master@{#463139}