Refactor MemoryAllocator to allow big normal pages

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 35240979829c2864718cdc8bc3f21f40001a3ab6..4c4bb56674ffa309edb9ded313ff7c350e90e11e 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -225,9 +225,9 @@ class Heap : public AllStatic {
  public:
   // Configure heap size before setup. Return false if the heap has been
   // setup already.
-  static bool ConfigureHeap(int max_semispace_size,
-                            int max_old_gen_size,
-                            int max_executable_size);
+  static bool ConfigureHeap(intptr_t max_semispace_size,
+                            intptr_t max_old_gen_size,
+                            intptr_t max_executable_size);
   static bool ConfigureHeapDefault();
 
   // Initializes the global object heap. If create_heap_objects is true,