Revert "Implement structural function and array types"

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 0981114ec404c100760795ba8ae82c403f33bba3..88e7f38c487f5ee1bd99d108348a7cf44e724f0f 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -496,8 +496,7 @@ void StoreStubCompiler::GenerateStoreTransition(MacroAssembler* masm,
   } else if (representation.IsHeapObject()) {
     HeapType* field_type = descriptors->GetFieldType(descriptor);
     if (field_type->IsClass()) {
-      __ CheckMap(value_reg, field_type->AsClass()->Map(),
-                  miss_label, DO_SMI_CHECK);
+      __ CheckMap(value_reg, field_type->AsClass(), miss_label, DO_SMI_CHECK);
     } else {
       ASSERT(HeapType::Any()->Is(field_type));
       __ JumpIfSmi(value_reg, miss_label);
@@ -647,8 +646,7 @@ void StoreStubCompiler::GenerateStoreField(MacroAssembler* masm,
   } else if (representation.IsHeapObject()) {
     HeapType* field_type = lookup->GetFieldType();
     if (field_type->IsClass()) {
-      __ CheckMap(value_reg, field_type->AsClass()->Map(),
-                  miss_label, DO_SMI_CHECK);
+      __ CheckMap(value_reg, field_type->AsClass(), miss_label, DO_SMI_CHECK);
     } else {
       ASSERT(HeapType::Any()->Is(field_type));
       __ JumpIfSmi(value_reg, miss_label);
@@ -755,9 +753,7 @@ Register StubCompiler::CheckPrototypes(Handle<HeapType> type,
   int depth = 0;
 
   Handle<JSObject> current = Handle<JSObject>::null();
-  if (type->IsConstant()) {
-    current = Handle<JSObject>::cast(type->AsConstant()->Value());
-  }
+  if (type->IsConstant()) current = Handle<JSObject>::cast(type->AsConstant());
   Handle<JSObject> prototype = Handle<JSObject>::null();
   Handle<Map> current_map = receiver_map;
   Handle<Map> holder_map(holder->map());