[ic] Simplify handling of primitive maps.

src/ic/handler-compiler.cc

Index: src/ic/handler-compiler.cc
diff --git a/src/ic/handler-compiler.cc b/src/ic/handler-compiler.cc
index 37933aff50ea2f1b8e0e9830f8e9edc652574d2a..9b10045f80b51d8ca2e88bfceaf0c632b6fc1499 100644
--- a/src/ic/handler-compiler.cc
+++ b/src/ic/handler-compiler.cc
@@ -95,24 +95,9 @@ Register NamedLoadHandlerCompiler::FrontendHeader(Register object_reg,
                                                   Handle<Name> name,
                                                   Label* miss,
                                                   ReturnHolder return_what) {
-  PrototypeCheckType check_type = SKIP_RECEIVER;
-  int function_index = map()->IsPrimitiveMap()
-                           ? map()->GetConstructorFunctionIndex()
-                           : Map::kNoConstructorFunctionIndex;
-  if (function_index != Map::kNoConstructorFunctionIndex) {
-    GenerateDirectLoadGlobalFunctionPrototype(masm(), function_index,
-                                              scratch1(), miss);
-    Object* function = isolate()->native_context()->get(function_index);
-    Object* prototype = JSFunction::cast(function)->instance_prototype();
-    Handle<Map> map(JSObject::cast(prototype)->map());
-    set_map(map);
-    object_reg = scratch1();
-    check_type = CHECK_ALL_MAPS;
-  }
-
   // Check that the maps starting from the prototype haven't changed.
   return CheckPrototypes(object_reg, scratch1(), scratch2(), scratch3(), name,
-                         miss, check_type, return_what);
+                         miss, return_what);
 }
 
 
@@ -123,7 +108,7 @@ Register NamedStoreHandlerCompiler::FrontendHeader(Register object_reg,
                                                    Label* miss,
                                                    ReturnHolder return_what) {
   return CheckPrototypes(object_reg, this->name(), scratch1(), scratch2(), name,
-                         miss, SKIP_RECEIVER, return_what);
+                         miss, return_what);
 }