Roll src/third_party/re2/src/ 22caec620..46155299e (1 commit)

https://chromium.googlesource.com/external/github.com/google/re2.git/+log/22caec62055a..46155299edb9

$ git log 22caec620..46155299e --date=short --no-merges --format='%ad %ae %s'
2018-10-31 junyer Don't log/crash when PrefilterTree::KeepNode() sees Prefilter::NONE.

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

R=mmoroz@chromium.org

Bug: 900558
Change-Id: Ic497e7019b2b072a91b0ea3710c138efa6d1ef7a
Reviewed-on: https://chromium-review.googlesource.com/c/1309878Reviewed-by: Max Moroz <mmoroz@chromium.org>
Commit-Queue: Max Moroz <mmoroz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604257}

DEPS

@@ -1060,7 +1060,7 @@ deps = {
   },
 
   'src/third_party/re2/src':
-    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + '22caec62055a7707cf5801bebb6028d06220f2b6',
+    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + '46155299edb9b30a44cfad233592a24c7d6a905d',
 
   'src/third_party/r8': {
       'packages': [