Verify encoded stack maps in debug builds.

Read all stack map data back after we write it and DCHECK the content.

Change-Id: Ia679594ac9e5805f6d4c56686030af153b45ea8b
diff --git a/compiler/optimizing/stack_map_stream.h b/compiler/optimizing/stack_map_stream.h
index fc27a2b..016a911 100644
--- a/compiler/optimizing/stack_map_stream.h
+++ b/compiler/optimizing/stack_map_stream.h
@@ -167,6 +167,13 @@
                             const BitVector& live_dex_registers_mask,
                             uint32_t start_index_in_dex_register_locations) const;
 
+  void CheckDexRegisterMap(const CodeInfo& code_info,
+                           const DexRegisterMap& dex_register_map,
+                           size_t num_dex_registers,
+                           BitVector* live_dex_registers_mask,
+                           size_t dex_register_locations_index) const;
+  void CheckCodeInfo(MemoryRegion region) const;
+
   ArenaAllocator* allocator_;
   ArenaVector<StackMapEntry> stack_maps_;