Revert of Always optimize for adding properties to native objects.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 019e7c11ea83c95bc2ec0cba8676d4a8bd9ea784..8ff6f40461f4d4cc6c67079325247c794f3b1a35 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -17,7 +17,9 @@
 
 // Helper function used to install functions on objects.
 function InstallFunctions(object, attributes, functions) {
-  %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1);
+  if (functions.length >= 8) {
+    %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1);
+  }
   for (var i = 0; i < functions.length; i += 2) {
     var key = functions[i];
     var f = functions[i + 1];
@@ -67,7 +69,9 @@
 
 // Helper function for installing constant properties on objects.
 function InstallConstants(object, constants) {
-  %OptimizeObjectForAddingMultipleProperties(object, constants.length >> 1);
+  if (constants.length >= 4) {
+    %OptimizeObjectForAddingMultipleProperties(object, constants.length >> 1);
+  }
   var attributes = DONT_ENUM | DONT_DELETE | READ_ONLY;
   for (var i = 0; i < constants.length; i += 2) {
     var name = constants[i];