Allow compilation of classes in different ClassLoaders

Change-Id: Ib0420471590a4c6d16bc25285ef3876098eacb36
diff --git a/src/jni_compiler_test.cc b/src/jni_compiler_test.cc
index 4cd32e8..016a606 100644
--- a/src/jni_compiler_test.cc
+++ b/src/jni_compiler_test.cc
@@ -66,7 +66,7 @@
   static jobject jobj_;
  protected:
   scoped_ptr<const DexFile> dex_;
-  PathClassLoader* class_loader_;
+  const PathClassLoader* class_loader_;
   Assembler jni_asm;
   JniCompiler jni_compiler;
   JNIEnv* env_;