Roll re2 dba3349..596d73e.

third_party/re2/README.chromium

Index: third_party/re2/README.chromium
diff --git a/third_party/re2/README.chromium b/third_party/re2/README.chromium
index f7d576d58178e01d9f9444ee1ab97a46aaad1db5..1d7b9c3329dd4f82be2f93a34ac68371dc06060d 100644
--- a/third_party/re2/README.chromium
+++ b/third_party/re2/README.chromium
@@ -1,8 +1,8 @@
 Name: re2 - an efficient, principled regular expression library
 Short Name: re2
 URL: https://github.com/google/re2
-Version: dba3349aba83b5588e85e5ecf2b56c97f2d259b7
-Date: 2015-12-10
+Version: aa627d9e7bb93778967e34cc015452ae453a4e78
+Date: 2017-02-13
 License: BSD 3-Clause
 License File: LICENSE
 Security Critical: yes
@@ -10,12 +10,3 @@ Security Critical: yes
 Description:
 RE2 is a fast, safe, thread-friendly alternative to backtracking regular
 expression engines like those used in PCRE, Perl, and Python.
-
-To update RE2, execute the following commands from your Chromium checkout:

[tfarina, 2017/02/13 10:09:05]

Why are you removing these instructions?

[mmoroz, 2017/02/13 10:15:46]

These instructions are not relevant anymore. It used to be relevant before
https://codereview.chromium.org/1544433002, when we had to update all the files
manually. Now it can be done much easier via DEPS.

-$ git clone https://github.com/google/re2 third_party/re2_new
-$ cp third_party/re2/OWNERS third_party/re2/BUILD.gn third_party/re2/re2.gyp \
-third_party/re2/README.chromium third_party/re2/DEPS third_party/re2_new
-$ rm -rf third_party/re2_new/.git
-$ rm -rf third_party/re2
-$ mv third_party/re2_new third_party/re2
-Then update third_party/re2/BUILD.gn and third_party/re2/re2.gyp.