Remove some asserts to speed up debug mode.

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 239 matching lines @@
 // Try linear allocation in the page of alloc_info's allocation top.  Does
 // not contain slow case logic (eg, move to the next page or try free list
 // allocation) so it can be used by all the allocation functions and for all
 // the paged spaces.
 HeapObject* PagedSpace::AllocateLinearly(int size_in_bytes) {
   Address current_top = allocation_info_.top;
   Address new_top = current_top + size_in_bytes;
   if (new_top > allocation_info_.limit) return NULL;
 
   allocation_info_.top = new_top;
-  ASSERT(allocation_info_.VerifyPagedAllocation());
-  ASSERT(current_top != NULL);
   return HeapObject::FromAddress(current_top);
 }
 
 
 // Raw allocation.
 MaybeObject* PagedSpace::AllocateRaw(int size_in_bytes) {
-  ASSERT(HasBeenSetup());
-  ASSERT_OBJECT_SIZE(size_in_bytes);
   HeapObject* object = AllocateLinearly(size_in_bytes);
   if (object != NULL) {
     if (identity() == CODE_SPACE) {
       SkipList::Update(object->address(), size_in_bytes);
     }
     return object;
   }
 
   object = free_list_.Allocate(size_in_bytes);
   if (object != NULL) {
@@ skipping 83 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_