GitLab

The header include guards should match the file path from root.

These entries were found using a modified version of Eric's
fix-include-guards.py script found attached in
https://code.google.com/p/chromium/issues/detail?id=435361#c7.

BUG=435361
TEST=content_unittests
R=avi@chromium.org
TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/942963003

Cr-Commit-Position: refs/heads/master@{#318520}