Add code creation logging for construct stubs.

src/stub-cache.cc

Index: src/stub-cache.cc
diff --git a/src/stub-cache.cc b/src/stub-cache.cc
index a719f29cfc4cd42377645fcc3fca50b5be158be8..2906c22927850a1cb9453a036c37a0f0034bb5a7 100644
--- a/src/stub-cache.cc
+++ b/src/stub-cache.cc
@@ -1099,9 +1099,14 @@ Object* CallStubCompiler::GetCode(PropertyType type, String* name) {
 
 Object* ConstructStubCompiler::GetCode() {
   Code::Flags flags = Code::ComputeFlags(Code::STUB);
-  return GetCodeWithFlags(flags, "ConstructStub");
+  Object* result = GetCodeWithFlags(flags, "ConstructStub");
+  if (!result->IsFailure()) {
+    Code* code = Code::cast(result);
+    USE(code);
+    LOG(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
+  }
+  return result;
 }
 
 
-
 } }  // namespace v8::internal