Revert of "[heap] Switch to 500k pages"

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 7474a55e432f7e2239d10fa1da59855c39db6b12..859d91381b1c290b2b14a9523656739a82bef2e7 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -2438,19 +2438,13 @@
   runtime_profiler_ = new RuntimeProfiler(this);
 
   // If we are deserializing, read the state into the now-empty heap.
-  {
-    AlwaysAllocateScope always_allocate(this);
-
-    if (!create_heap_objects) {
-      des->Deserialize(this);
-    }
-    load_stub_cache_->Initialize();
-    store_stub_cache_->Initialize();
-    if (FLAG_ignition || serializer_enabled()) {
-      interpreter_->Initialize();
-    }
-
-    heap_.NotifyDeserializationComplete();
+  if (!create_heap_objects) {
+    des->Deserialize(this);
+  }
+  load_stub_cache_->Initialize();
+  store_stub_cache_->Initialize();
+  if (FLAG_ignition || serializer_enabled()) {
+    interpreter_->Initialize();
   }
 
   // Finish initialization of ThreadLocal after deserialization is done.
@@ -2480,6 +2474,8 @@
            Internals::kExternalMemoryLimitOffset);
 
   time_millis_at_init_ = heap_.MonotonicallyIncreasingTimeInMs();
+
+  heap_.NotifyDeserializationComplete();
 
   if (!create_heap_objects) {
     // Now that the heap is consistent, it's OK to generate the code for the