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 a51dc18d446d8097d3a9e18dde9aab25ebb0e9c6..8e05254f745074684f41bb6348b36e90cc4e9551 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -500,20 +500,6 @@ 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()