Upgrade V8 to version 4.9.385.28

https://chromium.googlesource.com/v8/v8/+/4.9.385.28

FPIIM-449

Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/test/mjsunit/fast-prototype.js b/test/mjsunit/fast-prototype.js
index c59ec94..7432ecc 100644
--- a/test/mjsunit/fast-prototype.js
+++ b/test/mjsunit/fast-prototype.js
@@ -50,13 +50,14 @@
     (new Sub()).__proto__ = proto;
   } else {
     Sub.prototype = proto;
-    // Need to instantiate Sub to mark .prototype as prototype.
-    new Sub();
+    // Need to instantiate Sub to mark .prototype as prototype. Make sure the
+    // instantiated object is used so that the allocation is not optimized away.
+    %DebugPrint(new Sub());
   }
 }
 
 
-function test(use_new, add_first, set__proto__, same_map_as) {
+function test(use_new, add_first, set__proto__) {
   var proto = use_new ? new Super() : {};
 
   // New object is fast.
@@ -74,16 +75,8 @@
     // Still fast
     assertTrue(%HasFastProperties(proto));
     AddProps(proto);
-    if (set__proto__) {
-      // After we add all those properties it went slow mode again :-(
-      assertFalse(%HasFastProperties(proto));
-    } else {
-      // .prototype keeps it fast.
-      assertTrue(%HasFastProperties(proto));
-    }
-  }
-  if (same_map_as && !add_first && set__proto__) {
-    assertTrue(%HaveSameMap(same_map_as, proto));
+    // Still fast.
+    assertTrue(%HasFastProperties(proto));
   }
   return proto;
 }
@@ -96,9 +89,7 @@
   var use_new = ((i & 2) != 0);
 
   test(use_new, true, set__proto__);
-
-  var last = test(use_new, false, set__proto__);
-  test(use_new, false, set__proto__, last);
+  test(use_new, false, set__proto__);
 }