This patch simply reorders the elements of classes ParserTraits
and PreParserTraits (mainly method headers), so that in both
classes the elements are defined in the same order.  This is
useful for easily verifying the consistency between these two
classes.

R=adamk@chromium.org, marja@chromium.org
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2264483003
Cr-Commit-Position: refs/heads/master@{#38766}