Refactor and cleanup VirtualMemory.

src/spaces-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 107 matching lines @@
     ASSERT(cur_addr_ <= cur_end_);
     if (!obj->IsFiller()) {
       ASSERT_OBJECT_SIZE(obj_size);
       return obj;
     }
   }
   return NULL;
 }
 
 
-// -----------------------------------------------------------------------------
-// MemoryAllocator
-
-#ifdef ENABLE_HEAP_PROTECTION
-
-void MemoryAllocator::Protect(Address start, size_t size) {
-  OS::Protect(start, size);
-}
-
-
-void MemoryAllocator::Unprotect(Address start,
-                                size_t size,
-                                Executability executable) {
-  OS::Unprotect(start, size, executable);
-}
-
-
-void MemoryAllocator::ProtectChunkFromPage(Page* page) {
-  int id = GetChunkId(page);
-  OS::Protect(chunks_[id].address(), chunks_[id].size());
-}
-
-
-void MemoryAllocator::UnprotectChunkFromPage(Page* page) {
-  int id = GetChunkId(page);
-  OS::Unprotect(chunks_[id].address(), chunks_[id].size(),
-                chunks_[id].owner()->executable() == EXECUTABLE);
-}
-
-#endif
-
-
 // --------------------------------------------------------------------------
 // PagedSpace
 Page* Page::Initialize(Heap* heap,
                        MemoryChunk* chunk,
-                       Executability executable,
+                       VirtualMemory::Executability executability,
                        PagedSpace* owner) {
   Page* page = reinterpret_cast<Page*>(chunk);
   ASSERT(page->area_size() <= kNonCodeObjectAreaSize);
   ASSERT(chunk->owner() == owner);
   owner->IncreaseCapacity(page->area_size());
   owner->Free(page->area_start(), page->area_size());
 
   heap->incremental_marking()->SetOldSpacePageFlags(chunk);
 
   return page;
@@ skipping 180 matching lines @@
   Map* map = object->map();
   Heap* heap = object->GetHeap();
   return map == heap->raw_unchecked_free_space_map()
       || map == heap->raw_unchecked_one_pointer_filler_map()
       || map == heap->raw_unchecked_two_pointer_filler_map();
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_INL_H_