Fix typo in argument name.

Test: mma -j40 test-art-host
Change-Id: Ifff0e7b7ae64ce322562244a705fbe4e8f879689
diff --git a/runtime/runtime_callbacks_test.cc b/runtime/runtime_callbacks_test.cc
index 66eb2ec..f1e78b4 100644
--- a/runtime/runtime_callbacks_test.cc
+++ b/runtime/runtime_callbacks_test.cc
@@ -255,7 +255,7 @@
                                 const DexFile& initial_dex_file,
                                 const DexFile::ClassDef& initial_class_def ATTRIBUTE_UNUSED,
                                 /*out*/DexFile const** final_dex_file ATTRIBUTE_UNUSED,
-                                /*out*/DexFile::ClassDef const** final_dex_cache ATTRIBUTE_UNUSED)
+                                /*out*/DexFile::ClassDef const** final_class_def ATTRIBUTE_UNUSED)
         OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
       std::string location(initial_dex_file.GetLocation());
       std::string event =