Roll re2 dba3349..596d73e.

third_party/re2/BUILD.gn

Index: third_party/re2/BUILD.gn
diff --git a/third_party/re2/BUILD.gn b/third_party/re2/BUILD.gn
index 9563f6a19ec824cf1d4631a9cfac970147fc647d..4ced4b2f15b44455825ee0cd38ddf6d61b01eac6 100644
--- a/third_party/re2/BUILD.gn
+++ b/third_party/re2/BUILD.gn
@@ -8,6 +8,7 @@ config("re2_config") {
 
 static_library("re2") {
   sources = [
+    "src/re2/bitmap256.h",
     "src/re2/bitstate.cc",
     "src/re2/compile.cc",
     "src/re2/dfa.cc",
@@ -38,23 +39,18 @@ static_library("re2") {
     "src/re2/unicode_casefold.h",
     "src/re2/unicode_groups.cc",
     "src/re2/unicode_groups.h",
-    "src/re2/variadic_function.h",
     "src/re2/walker-inl.h",
-    "src/util/atomicops.h",
     "src/util/flags.h",
-    "src/util/hash.cc",
-    "src/util/logging.cc",
     "src/util/logging.h",
+    "src/util/mix.h",
     "src/util/mutex.h",
     "src/util/rune.cc",
     "src/util/sparse_array.h",
     "src/util/sparse_set.h",
-    "src/util/stringprintf.cc",
     "src/util/strutil.cc",
+    "src/util/strutil.h",
     "src/util/utf.h",
     "src/util/util.h",
-    "src/util/valgrind.cc",
-    "src/util/valgrind.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]