jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

base/android/library_loader/library_loader_hooks.cc

Index: base/android/library_loader/library_loader_hooks.cc
diff --git a/base/android/library_loader/library_loader_hooks.cc b/base/android/library_loader/library_loader_hooks.cc
index 2ba78883471c15d80c78e5a6d83a878cc76b98c0..18eb7b949f7943ba6addddc3c8747b9183086797 100644
--- a/base/android/library_loader/library_loader_hooks.cc
+++ b/base/android/library_loader/library_loader_hooks.cc
@@ -152,8 +152,8 @@ void SetVersionNumber(const char* version_number) {
   g_library_version_number = strdup(version_number);
 }
 
-jstring GetVersionNumber(JNIEnv* env, jobject jcaller) {
-  return ConvertUTF8ToJavaString(env, g_library_version_number).Release();
+ScopedJavaLocalRef<jstring> GetVersionNumber(JNIEnv* env, jobject jcaller) {
+  return ConvertUTF8ToJavaString(env, g_library_version_number);
 }
 
 LibraryProcessType GetLibraryProcessType(JNIEnv* env) {