Support large objects in the serializer/deserializer.

src/heap/spaces.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include "src/allocation.h"
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
@@ skipping 2710 matching lines @@
   static intptr_t ObjectSizeFor(intptr_t chunk_size) {
     if (chunk_size <= (Page::kPageSize + Page::kObjectStartOffset)) return 0;
     return chunk_size - Page::kPageSize - Page::kObjectStartOffset;
   }
 
   // Shared implementation of AllocateRaw, AllocateRawCode and
   // AllocateRawFixedArray.
   MUST_USE_RESULT AllocationResult
       AllocateRaw(int object_size, Executability executable);
 
+  bool CanAllocateSize(int size) { return Size() + size <= max_capacity_; }
+
   // Available bytes for objects in this space.
   inline intptr_t Available();
 
   virtual intptr_t Size() { return size_; }
 
   virtual intptr_t SizeOfObjects() { return objects_size_; }
 
   intptr_t MaximumCommittedMemory() { return maximum_committed_; }
 
   intptr_t CommittedMemory() { return Size(); }
@@ skipping 136 matching lines @@
     count = 0;
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_SPACES_H_