Use a dictionary-mode code cache on the map rather than a dual system.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 58092a49baad8cc552e74bb80f1a43e685bf619e..def2cd85ba151fc7311fd0a409dcb065e8c517cf 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -506,20 +506,6 @@ void Map::MapPrint(std::ostream& os) {  // NOLINT
 }
 
 
-void CodeCache::CodeCachePrint(std::ostream& os) {  // NOLINT
-  HeapObject::PrintHeader(os, "CodeCache");
-  os << "\n - default_cache: " << Brief(default_cache());
-  os << "\n - normal_type_cache: " << Brief(normal_type_cache());
-}
-
-
-void PolymorphicCodeCache::PolymorphicCodeCachePrint(
-    std::ostream& os) {  // NOLINT
-  HeapObject::PrintHeader(os, "PolymorphicCodeCache");
-  os << "\n - cache: " << Brief(cache());
-}
-
-
 void TypeFeedbackInfo::TypeFeedbackInfoPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "TypeFeedbackInfo");
   os << "\n - ic_total_count: " << ic_total_count()