diff --git a/include/utils/AssetManager.h b/include/utils/AssetManager.h
index 9e2bf37..a8c7ddb 100644
--- a/include/utils/AssetManager.h
+++ b/include/utils/AssetManager.h
@@ -222,6 +222,7 @@
     {
         String8 path;
         FileType type;
+        String8 idmap;
     };
 
     Asset* openInPathLocked(const char* fileName, AccessMode mode,
@@ -262,6 +263,16 @@
     void setLocaleLocked(const char* locale);
     void updateResourceParamsLocked() const;
 
+    bool createIdmapFileLocked(const String8& originalPath, const String8& overlayPath,
+                               const String8& idmapPath);
+
+    bool isIdmapStaleLocked(const String8& originalPath, const String8& overlayPath,
+                            const String8& idmapPath);
+
+    Asset* openIdmapLocked(const struct asset_path& ap) const;
+
+    bool getZipEntryCrcLocked(const String8& zipPath, const char* entryFilename, uint32_t* pCrc);
+
     class SharedZip : public RefBase {
     public:
         static sp<SharedZip> get(const String8& path);