Revert "Revert "Make original dex file be more deduplicated""

This reverts commit a7c04c4fe6623985ba2d0cca942d5e1e584f4358.

Reason for revert: Issue with target buildbots was fixed

Test: m clean && ./test.py --target -j8
Bug: 31455788

Change-Id: If00ef9433a9308810a40ea4e0d809987c934cef8
diff --git a/runtime/mirror/class_ext.h b/runtime/mirror/class_ext.h
index fac955a..708665d 100644
--- a/runtime/mirror/class_ext.h
+++ b/runtime/mirror/class_ext.h
@@ -60,11 +60,11 @@
         OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_methods_));
   }
 
-  ByteArray* GetOriginalDexFileBytes() REQUIRES_SHARED(Locks::mutator_lock_) {
-    return GetFieldObject<ByteArray>(OFFSET_OF_OBJECT_MEMBER(ClassExt, original_dex_file_bytes_));
+  Object* GetOriginalDexFile() REQUIRES_SHARED(Locks::mutator_lock_) {
+    return GetFieldObject<Object>(OFFSET_OF_OBJECT_MEMBER(ClassExt, original_dex_file_));
   }
 
-  void SetOriginalDexFileBytes(ObjPtr<ByteArray> bytes) REQUIRES_SHARED(Locks::mutator_lock_);
+  void SetOriginalDexFile(ObjPtr<Object> bytes) REQUIRES_SHARED(Locks::mutator_lock_);
 
   void SetObsoleteArrays(ObjPtr<PointerArray> methods, ObjPtr<ObjectArray<DexCache>> dex_caches)
       REQUIRES_SHARED(Locks::mutator_lock_);
@@ -89,7 +89,7 @@
 
   HeapReference<PointerArray> obsolete_methods_;
 
-  HeapReference<ByteArray> original_dex_file_bytes_;
+  HeapReference<Object> original_dex_file_;
 
   // The saved verification error of this class.
   HeapReference<Object> verify_error_;