Revert of Update re2

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 5dd65d5b71c1e21a4c5e39b03231fc84ea2d8944..f57625895e471978d2b61e28f4f1be133ea2dd07 100644
--- a/third_party/re2/re2/filtered_re2.cc
+++ b/third_party/re2/re2/filtered_re2.cc
@@ -16,7 +16,7 @@
 }
 
 FilteredRE2::~FilteredRE2() {
-  for (size_t i = 0; i < re2_vec_.size(); i++)
+  for (int i = 0; i < re2_vec_.size(); i++)
     delete re2_vec_[i];
   delete prefilter_tree_;
 }
@@ -33,7 +33,7 @@
     }
     delete re;
   } else {
-    *id = static_cast<int>(re2_vec_.size());
+    *id = re2_vec_.size();
     re2_vec_.push_back(re);
   }
 
@@ -46,7 +46,7 @@
     return;
   }
 
-  for (size_t i = 0; i < re2_vec_.size(); i++) {
+  for (int i = 0; i < re2_vec_.size(); i++) {
     Prefilter* prefilter = Prefilter::FromRE2(re2_vec_[i]);
     prefilter_tree_->Add(prefilter);
   }
@@ -56,9 +56,9 @@
 }
 
 int FilteredRE2::SlowFirstMatch(const StringPiece& text) const {
-  for (size_t i = 0; i < re2_vec_.size(); i++)
+  for (int i = 0; i < re2_vec_.size(); i++)
     if (RE2::PartialMatch(text, *re2_vec_[i]))
-      return static_cast<int>(i);
+      return i;
   return -1;
 }
 
@@ -70,7 +70,7 @@
   }
   vector<int> regexps;
   prefilter_tree_->RegexpsGivenStrings(atoms, &regexps);
-  for (size_t i = 0; i < regexps.size(); i++)
+  for (int i = 0; i < regexps.size(); i++)
     if (RE2::PartialMatch(text, *re2_vec_[regexps[i]]))
       return regexps[i];
   return -1;
@@ -83,16 +83,10 @@
   matching_regexps->clear();
   vector<int> regexps;
   prefilter_tree_->RegexpsGivenStrings(atoms, &regexps);
-  for (size_t i = 0; i < regexps.size(); i++)
+  for (int i = 0; i < regexps.size(); i++)
     if (RE2::PartialMatch(text, *re2_vec_[regexps[i]]))
       matching_regexps->push_back(regexps[i]);
   return !matching_regexps->empty();
-}
-
-void FilteredRE2::AllPotentials(
-    const vector<int>& atoms,
-    vector<int>* potential_regexps) const {
-  prefilter_tree_->RegexpsGivenStrings(atoms, potential_regexps);
 }
 
 void FilteredRE2::RegexpsGivenStrings(const vector<int>& matched_atoms,
@@ -100,6 +94,7 @@
   prefilter_tree_->RegexpsGivenStrings(matched_atoms, passed_regexps);
 }
 
+
 void FilteredRE2::PrintPrefilter(int regexpid) {
   prefilter_tree_->PrintPrefilter(regexpid);
 }