[heap] Reland prepare code for smaller large object allocation limit than max allocatable memory.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a9206fe1c20c68544e6039dc1b69abeaab86c45e..6381c3c48313587e314ea0986af351c13c9d8135 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2366,10 +2366,6 @@ class JSObject: public JSReceiver {
   // don't want to be wasteful with long lived objects.
   static const int kMaxUncheckedOldFastElementsLength = 500;
 
-  // Note that Page::kMaxRegularHeapObjectSize puts a limit on
-  // permissible values (see the DCHECK in heap.cc).
-  static const int kInitialMaxFastElementArray = 100000;
-
   // This constant applies only to the initial map of "global.Object" and
   // not to arbitrary other JSObject maps.
   static const int kInitialGlobalObjectUnusedPropertiesCount = 4;
@@ -10042,6 +10038,10 @@ class JSArray: public JSObject {
   static const int kLengthOffset = JSObject::kHeaderSize;
   static const int kSize = kLengthOffset + kPointerSize;
 
+  // Note that Page::kMaxRegularHeapObjectSize puts a limit on
+  // permissible values (see the DCHECK in heap.cc).
+  static const int kInitialMaxFastElementArray = 100000;
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSArray);
 };