Fix JSInliningHeuristic::CandidateCompare predicate.

STL requires comparison to be a strict weak ordering.

In particular the predicate should be antisymmetric:
f(x, y) implies !f(y, x).

BUG=v8:4848
LOG=NO

Review URL: https://codereview.chromium.org/1818043004

Cr-Commit-Position: refs/heads/master@{#34960}

src/compiler/js-inlining-heuristic.cc

@@ -121,7 +121,10 @@ void JSInliningHeuristic::Finalize() {
 
 bool JSInliningHeuristic::CandidateCompare::operator()(
     const Candidate& left, const Candidate& right) const {
-  return left.node != right.node && left.calls >= right.calls;
+  if (left.calls != right.calls) {
+    return left.calls > right.calls;
+  }
+  return left.node < right.node;
 }