Break allocations in the code serializer into correct chunk sizes.

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index 85281aabbfe001b37eb540202684799492bc1c18..430f31de6c6d61db8973191a6a7d368ca0b111e8 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -892,18 +892,14 @@ void MemoryChunk::IncrementLiveBytesFromMutator(Address address, int by) {
 // -----------------------------------------------------------------------------
 // PagedSpace implementation
 
-PagedSpace::PagedSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id,
+PagedSpace::PagedSpace(Heap* heap, intptr_t max_capacity, AllocationSpace space,
                        Executability executable)
-    : Space(heap, id, executable),
+    : Space(heap, space, executable),
       free_list_(this),
       unswept_free_bytes_(0),
       end_of_unswept_pages_(NULL),
       emergency_memory_(NULL) {
-  if (id == CODE_SPACE) {
-    area_size_ = heap->isolate()->memory_allocator()->CodePageAreaSize();
-  } else {
-    area_size_ = Page::kPageSize - Page::kObjectStartOffset;
-  }
+  area_size_ = MemoryAllocator::PageAreaSize(space);
   max_capacity_ =
       (RoundDown(max_capacity, Page::kPageSize) / Page::kPageSize) * AreaSize();
   accounting_stats_.Clear();