Roll src/third_party/re2/src/ 54ca2cd59..6272edcb5 (1 commit)

https://chromium.googlesource.com/external/github.com/google/re2.git/+log/54ca2cd59219..6272edcb53d3

$ git log 54ca2cd59..6272edcb5 --date=short --no-merges --format='%ad %ae %s'
2018-10-11 junyer Dial down the fanout limits slightly.

Created with:
  roll-dep src/third_party/re2/src

R=mmoroz@chromium.org

Bug: 894073
Change-Id: I4ec6ee50d405fb3b6d72fc27a328cb8b3e16bad2
Reviewed-on: https://chromium-review.googlesource.com/c/1276826Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#598806}

DEPS

@@ -1010,7 +1010,7 @@ deps = {
   },
 
   'src/third_party/re2/src':
-    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + '54ca2cd59219aab637e7a5e1e6d0f383a36df192',
+    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + '6272edcb53d3c8705f57df3b46b1f92e646e30bc',
 
   'src/third_party/r8': {
       'packages': [