[turbofan] Call frequencies for JSCallFunction and JSCallConstruct.

src/compiler/js-inlining-heuristic.h

Index: src/compiler/js-inlining-heuristic.h
diff --git a/src/compiler/js-inlining-heuristic.h b/src/compiler/js-inlining-heuristic.h
index 87b3c864e02838313bfeb7cc1652b479af43ebbe..367e35ad625f0601121995c4d795bd9733903604 100644
--- a/src/compiler/js-inlining-heuristic.h
+++ b/src/compiler/js-inlining-heuristic.h
@@ -37,8 +37,8 @@ class JSInliningHeuristic final : public AdvancedReducer {
   struct Candidate {
     Handle<JSFunction> functions[kMaxCallPolymorphism];
     int num_functions;
-    Node* node = nullptr;  // The call site at which to inline.
-    int calls = -1;        // Number of times the call site was hit.
+    Node* node = nullptr;    // The call site at which to inline.
+    float frequency = 0.0f;  // Relative frequency of this call site.
   };
 
   // Comparator for candidates.