jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/compositor/scene_layer/scene_layer.cc

Index: chrome/browser/android/compositor/scene_layer/scene_layer.cc
diff --git a/chrome/browser/android/compositor/scene_layer/scene_layer.cc b/chrome/browser/android/compositor/scene_layer/scene_layer.cc
index 33d4c21f08d28ccaed785c502bfedc3c457238cc..5995e97dbb1f4ae8e9c140b0556916364603e5fb 100644
--- a/chrome/browser/android/compositor/scene_layer/scene_layer.cc
+++ b/chrome/browser/android/compositor/scene_layer/scene_layer.cc
@@ -58,7 +58,7 @@ SkColor SceneLayer::GetBackgroundColor() {
   return SK_ColorWHITE;
 }
 
-static jlong Init(JNIEnv* env, jobject jobj) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& jobj) {
   // This will automatically bind to the Java object and pass ownership there.
   SceneLayer* tree_provider = new SceneLayer(env, jobj);
   return reinterpret_cast<intptr_t>(tree_provider);