Create AllocationSite objects, pointed to by AllocationSiteInfo.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index c0c0e477bf8dd65c5a76c4ca79eb3c56cc8417c0..177ab518e44d767196b2c37973e9fa517a24c937 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -912,10 +912,15 @@ void TypeSwitchInfo::TypeSwitchInfoVerify() {
 }
 
 
+void AllocationSite::AllocationSiteVerify() {
+  CHECK(IsAllocationSite());
+}
+
+
 void AllocationSiteInfo::AllocationSiteInfoVerify() {
   CHECK(IsAllocationSiteInfo());
-  VerifyHeapPointer(payload());
-  CHECK(payload()->IsObject());
+  VerifyHeapPointer(allocation_site());
+  CHECK(!site_is_valid() || allocation_site()->IsAllocationSite());
 }