Roll re2 db20d46..ae9cb49.

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 285 matching lines @@
     Var('chromium_git') + '/external/github.com/chromium/dom-distiller-dist.git' + '@' + 'cfd68cb97b3050fd35f53c5231128f723d6dae08',
 
   'src/third_party/catapult':
     Var('chromium_git') + '/external/github.com/catapult-project/catapult.git' + '@' +
     Var('catapult_revision'),
 
   'src/third_party/openh264/src':
     Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '0fd88df93c5dcaf858c57eb7892bd27763f0f0ac',
 
   'src/third_party/re2/src':
-    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'db20d46c05900a12539225fe800dd860b14e0061',
+    Var('chromium_git') + '/external/github.com/google/re2.git' + '@' + 'ae9cb49a2e2ba95de4f0c6ec5a8afd039996d2c7',
 
   # Used for building libFuzzers (only supports Linux).
   'src/third_party/libFuzzer/src':
     Var('chromium_git') + '/chromium/llvm-project/llvm/lib/Fuzzer.git' + '@' +  Var('libfuzzer_revision'),
 
   'src/third_party/libprotobuf-mutator/src':
     Var('chromium_git') + '/external/github.com/google/libprotobuf-mutator.git' + '@' +  Var('libprotobuf-mutator'),
 
   'src/third_party/visualmetrics/src':
     Var('chromium_git') + '/external/github.com/WPO-Foundation/visualmetrics.git' + '@' +  '1edde9d2fe203229c895b648fdec355917200ad6',
@@ skipping 839 matching lines @@
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
   # ANGLE manages DEPS that it also owns the build files for, such as dEQP.
   ("src/third_party/angle", "DEPS.chromium"),
   # SwiftShader manages DEPS that it also owns the build files for, such as Subzero.
   ("src/third_party/swiftshader", "DEPS"),
 ]