[heap] Use safe way to obtain page in PagedSpace::Contains(Address addr).

src/heap/spaces-inl.h

Index: src/heap/spaces-inl.h
diff --git a/src/heap/spaces-inl.h b/src/heap/spaces-inl.h
index faf18e07a6808630db715cb7419dc67ec16ee2cf..685611e8151527a150a952be9ce47d28b64c0167 100644
--- a/src/heap/spaces-inl.h
+++ b/src/heap/spaces-inl.h
@@ -249,9 +249,7 @@ void MemoryChunk::IncrementLiveBytes(int by) {
 }
 
 bool PagedSpace::Contains(Address addr) {
-  Page* p = Page::FromAddress(addr);
-  if (!Page::IsValid(p)) return false;
-  return p->owner() == this;
+  return MemoryChunk::FromAnyPointerAddress(heap(), addr)->owner() == this;
 }
 
 bool PagedSpace::Contains(Object* o) {