Updated to most recent version RE2 and remove upstreamed patches.

third_party/re2/re2/dfa.cc

Index: third_party/re2/re2/dfa.cc
diff --git a/third_party/re2/re2/dfa.cc b/third_party/re2/re2/dfa.cc
index 36ec66f2f2742c8a79c8d29d9209f566d46bb8df..f1fc7b0caf1b57570b2a81f1cfd6ee6b766bd36b 100644
--- a/third_party/re2/re2/dfa.cc
+++ b/third_party/re2/re2/dfa.cc
@@ -470,8 +470,8 @@ DFA::DFA(Prog* prog, Prog::MatchKind kind, int64 max_mem)
   // At minimum, the search requires room for two states in order
   // to limp along, restarting frequently.  We'll get better performance
   // if there is room for a larger number of states, say 20.
-  size_t one_state = sizeof(State) + (prog_->size()+nmark)*sizeof(int) +
-                     (prog_->bytemap_range()+1)*sizeof(State*);
+  int64 one_state = sizeof(State) + (prog_->size()+nmark)*sizeof(int) +
+                    (prog_->bytemap_range()+1)*sizeof(State*);
   if (state_budget_ < 20*one_state) {
     LOG(INFO) << StringPrintf("DFA out of memory: prog size %lld mem %lld",
                               prog_->size(), max_mem);