Provide call counts for constructor calls, surface them as a vector IC.

src/compiler/js-inlining-heuristic.cc

Index: src/compiler/js-inlining-heuristic.cc
diff --git a/src/compiler/js-inlining-heuristic.cc b/src/compiler/js-inlining-heuristic.cc
index 38595dbf95cb9b2d4e72be03aad76fb6d206d115..65531473ad22ead63ede7ace0d92b1aed5759d5b 100644
--- a/src/compiler/js-inlining-heuristic.cc
+++ b/src/compiler/js-inlining-heuristic.cc
@@ -75,13 +75,18 @@ Reduction JSInliningHeuristic::Reduce(Node* node) {
 
   // Gather feedback on how often this call site has been hit before.
   int calls = -1;  // Same default as CallICNexus::ExtractCallCount.
-  // TODO(turbofan): We also want call counts for constructor calls.
   if (node->opcode() == IrOpcode::kJSCallFunction) {
     CallFunctionParameters p = CallFunctionParametersOf(node->op());
     if (p.feedback().IsValid()) {
       CallICNexus nexus(p.feedback().vector(), p.feedback().slot());
       calls = nexus.ExtractCallCount();
     }
+  } else if (node->opcode() == IrOpcode::kJSCallConstruct) {
+    CallConstructParameters p = CallConstructParametersOf(node->op());
+    if (p.feedback().IsValid()) {
+      ConstructICNexus nexus(p.feedback().vector(), p.feedback().slot());
+      calls = nexus.ExtractCallCount();
+    }
   }
 
   // ---------------------------------------------------------------------------