[NFC][sanitizer] Make method const

GitOrigin-RevId: b1a68b170c44e8d5298800a080444c0b82366e51
diff --git a/lib/sanitizer_common/sanitizer_stack_store.cpp b/lib/sanitizer_common/sanitizer_stack_store.cpp
index a028950..e6c61d9 100644
--- a/lib/sanitizer_common/sanitizer_stack_store.cpp
+++ b/lib/sanitizer_common/sanitizer_stack_store.cpp
@@ -43,7 +43,7 @@
   return reinterpret_cast<StackStore::Id>(stack_trace);
 }
 
-StackTrace StackStore::Load(Id id) {
+StackTrace StackStore::Load(Id id) const {
   if (!id)
     return {};
   const uptr *stack_trace = reinterpret_cast<const uptr *>(id);
diff --git a/lib/sanitizer_common/sanitizer_stack_store.h b/lib/sanitizer_common/sanitizer_stack_store.h
index 35602d2..4e24fd2 100644
--- a/lib/sanitizer_common/sanitizer_stack_store.h
+++ b/lib/sanitizer_common/sanitizer_stack_store.h
@@ -23,7 +23,7 @@
   using Id = uptr;
 
   Id Store(const StackTrace &trace);
-  StackTrace Load(Id id);
+  StackTrace Load(Id id) const;
   uptr Allocated() const;
 
   void TestOnlyUnmap();