Revert of jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

components/cronet/android/cronet_histogram_manager.cc

Index: components/cronet/android/cronet_histogram_manager.cc
diff --git a/components/cronet/android/cronet_histogram_manager.cc b/components/cronet/android/cronet_histogram_manager.cc
index ae0de70dd35431d08b431a5e23065057f7ad2e40..de1989bdef57b5537fe9b7b417712fa17c10eb62 100644
--- a/components/cronet/android/cronet_histogram_manager.cc
+++ b/components/cronet/android/cronet_histogram_manager.cc
@@ -24,12 +24,11 @@
   base::StatisticsRecorder::Initialize();
 }
 
-static ScopedJavaLocalRef<jbyteArray> GetHistogramDeltas(JNIEnv* env,
-                                                         jobject jcaller) {
+static jbyteArray GetHistogramDeltas(JNIEnv* env, jobject jcaller) {
   std::vector<uint8> data;
   if (!HistogramManager::GetInstance()->GetDeltas(&data))
-    return ScopedJavaLocalRef<jbyteArray>();
-  return base::android::ToJavaByteArray(env, &data[0], data.size());
+    return NULL;
+  return base::android::ToJavaByteArray(env, &data[0], data.size()).Release();
 }
 
 }  // namespace cronet