Make Failure inherit from MaybeObject instead of Object.

src/serialize.cc

 // Copyright 2006-2008 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 537 matching lines @@
 
 
 // This routine both allocates a new object, and also keeps
 // track of where objects have been allocated so that we can
 // fix back references when deserializing.
 Address Deserializer::Allocate(int space_index, Space* space, int size) {
   Address address;
   if (!SpaceIsLarge(space_index)) {
     ASSERT(!SpaceIsPaged(space_index) ||
            size <= Page::kPageSize - Page::kObjectStartOffset);
-    Object* new_allocation;
+    MaybeObject* maybe_new_allocation;
     if (space_index == NEW_SPACE) {
-      new_allocation = reinterpret_cast<NewSpace*>(space)->AllocateRaw(size);
+      maybe_new_allocation =
+          reinterpret_cast<NewSpace*>(space)->AllocateRaw(size);
     } else {
-      new_allocation = reinterpret_cast<PagedSpace*>(space)->AllocateRaw(size);
+      maybe_new_allocation =
+          reinterpret_cast<PagedSpace*>(space)->AllocateRaw(size);
     }
+    Object* new_allocation = maybe_new_allocation->ToObjectUnchecked();
     HeapObject* new_object = HeapObject::cast(new_allocation);
-    ASSERT(!new_object->IsFailure());
     address = new_object->address();
     high_water_[space_index] = address + size;
   } else {
     ASSERT(SpaceIsLarge(space_index));
     ASSERT(size > Page::kPageSize - Page::kObjectStartOffset);
     LargeObjectSpace* lo_space = reinterpret_cast<LargeObjectSpace*>(space);
     Object* new_allocation;
     if (space_index == kLargeData) {
-      new_allocation = lo_space->AllocateRaw(size);
+      new_allocation = lo_space->AllocateRaw(size)->ToObjectUnchecked();
     } else if (space_index == kLargeFixedArray) {
-      new_allocation = lo_space->AllocateRawFixedArray(size);
+      new_allocation =
+          lo_space->AllocateRawFixedArray(size)->ToObjectUnchecked();
     } else {
       ASSERT_EQ(kLargeCode, space_index);
-      new_allocation = lo_space->AllocateRawCode(size);
+      new_allocation = lo_space->AllocateRawCode(size)->ToObjectUnchecked();
     }
-    ASSERT(!new_allocation->IsFailure());
     HeapObject* new_object = HeapObject::cast(new_allocation);
     // Record all large objects in the same space.
     address = new_object->address();
     pages_[LO_SPACE].Add(address);
   }
   last_object_address_ = address;
   return address;
 }
 
 
@@ skipping 893 matching lines @@
       fullness_[space] = RoundUp(fullness_[space], Page::kPageSize);
     }
   }
   int allocation_address = fullness_[space];
   fullness_[space] = allocation_address + size;
   return allocation_address;
 }
 
 
 } }  // namespace v8::internal