Roll src/third_party/re2/src/ 6c109e908..b0a41e521 (7 commits)

https://chromium.googlesource.com/external/github.com/google/re2.git/+log/6c109e908aa4..b0a41e52137a

$ git log 6c109e908..b0a41e521 --date=short --no-merges --format='%ad %ae %s'
2020-02-13 junyer MSVC also doesn't like casting lambdas with `+'. Sigh.
2020-02-13 junyer Only the latest MSVC allows designated initalisers.
2020-02-13 junyer Provide instrumentation points called "hooks".
2020-02-11 junyer Tidy up some GCC-only guards.
2020-02-04 junyer Tidy up the SWIG guard around LazyRE2.
2020-02-03 junyer Tweak some of the comments about FilteredRE2.
2020-01-31 junyer Avoid using the forward DFA in "ANCHOR_END" cases.

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

R=mmoroz@chromium.org

Change-Id: I3cbdc7e574b22907aebd6c31bc7220c7bbb6b8d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2055505Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741433}

DEPS

@@ -1334,7 +1334,7 @@ deps = {
   },
 
   'src/third_party/re2/src':
-    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + '6c109e908aa4006c0cd147d2397023b7b8f2705d',
+    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'b0a41e52137a4cae183dcf194faa007cd9a1c344',
 
   'src/third_party/r8': {
       'packages': [