update_engine: Update libchrome APIs to r369476

The new libchrome has been ported from Chromium and some APIs have
changed. Make necessary changes at call sites.

Change-Id: I42e65bda7f1dbdf6f6e0ebf356d2cfea6b729193
diff --git a/payload_generator/cycle_breaker.cc b/payload_generator/cycle_breaker.cc
index 321732e..52a6f60 100644
--- a/payload_generator/cycle_breaker.cc
+++ b/payload_generator/cycle_breaker.cc
@@ -108,7 +108,7 @@
   CHECK_GE(stack_.size(),
            static_cast<vector<Vertex::Index>::size_type>(2));
   Edge min_edge = make_pair(stack_[0], stack_[1]);
-  uint64_t min_edge_weight = kuint64max;
+  uint64_t min_edge_weight = std::numeric_limits<uint64_t>::max();
   size_t edges_considered = 0;
   for (vector<Vertex::Index>::const_iterator it = stack_.begin();
        it != (stack_.end() - 1); ++it) {