Updated to most recent version RE2 and remove upstreamed patches.

third_party/re2/re2/filtered_re2.cc

Index: third_party/re2/re2/filtered_re2.cc
diff --git a/third_party/re2/re2/filtered_re2.cc b/third_party/re2/re2/filtered_re2.cc
index 9269cee105826e605ec181f8cbe6b45b81ee3d26..f57625895e471978d2b61e28f4f1be133ea2dd07 100644
--- a/third_party/re2/re2/filtered_re2.cc
+++ b/third_party/re2/re2/filtered_re2.cc
@@ -27,8 +27,10 @@ RE2::ErrorCode FilteredRE2::Add(const StringPiece& pattern,
   RE2::ErrorCode code = re->error_code();
 
   if (!re->ok()) {
-    LOG(ERROR) << "Couldn't compile regular expression, skipping: "
-               << re << " due to error " << re->error();
+    if (options.log_errors()) {
+      LOG(ERROR) << "Couldn't compile regular expression, skipping: "
+                 << re << " due to error " << re->error();
+    }
     delete re;
   } else {
     *id = re2_vec_.size();