Reland Call DisableInlineAllocation() in heap setup when flag inline_new is off.

BUG=

Review URL: https://codereview.chromium.org/806783002

Cr-Commit-Position: refs/heads/master@{#25819}

src/isolate.cc

@@ -2148,6 +2148,8 @@ bool Isolate::Init(Deserializer* des) {
 
   initialized_from_snapshot_ = (des != NULL);
 
+  if (!FLAG_inline_new) heap_.DisableInlineAllocation();
+
   return true;
 }