Make objects embedded in optimized code weak.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index ad13d7f5a56a54c9a315a23ee52310835caa7e9d..caf0bafd70c490165637ce89782853d961fe95cf 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -665,16 +665,20 @@ void Code::CodeVerify() {
 }
 
 
-void Code::VerifyEmbeddedMapsDependency() {
+void Code::VerifyEmbeddedObjectsDependency() {
   int mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
   for (RelocIterator it(this, mode_mask); !it.done(); it.next()) {
-    RelocInfo::Mode mode = it.rinfo()->rmode();
-    if (mode == RelocInfo::EMBEDDED_OBJECT &&
-      it.rinfo()->target_object()->IsMap()) {
-      Map* map = Map::cast(it.rinfo()->target_object());
-      if (map->CanTransition()) {
+    Object* obj = it.rinfo()->target_object();
+    if (IsWeakEmbeddedObject(kind(), obj)) {
+      if (obj->IsMap()) {
+        Map* map = Map::cast(obj);
         CHECK(map->dependent_code()->Contains(
             DependentCode::kWeaklyEmbeddedGroup, this));
+      } else if (obj->IsJSObject()) {
+        Object* raw_table = GetIsolate()->heap()->weak_object_to_code_table();
+        WeakHashTable* table = WeakHashTable::cast(raw_table);
+        CHECK(DependentCode::cast(table->Lookup(obj))->Contains(
+            DependentCode::kWeaklyEmbeddedGroup, this));
       }
     }
   }