jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/find_in_page/find_in_page_bridge.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/find_in_page/find_in_page_bridge.h"
 
 #include "base/android/jni_string.h"
 #include "chrome/browser/ui/find_bar/find_tab_helper.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/FindInPageBridge_jni.h"
@@ skipping 52 matching lines @@
       ActivateNearestFindResult(x, y);
 }
 
 void FindInPageBridge::ActivateFindInPageResultForAccessibility(
     JNIEnv* env, jobject obj) {
   FindTabHelper::FromWebContents(web_contents_)->
       ActivateFindInPageResultForAccessibility();
 }
 
 // static
-static jlong Init(JNIEnv* env, jobject obj, jobject j_web_contents) {
+static jlong Init(JNIEnv* env,
+                  const JavaParamRef<jobject>& obj,
+                  const JavaParamRef<jobject>& j_web_contents) {
   FindInPageBridge* bridge = new FindInPageBridge(env, obj, j_web_contents);
   return reinterpret_cast<intptr_t>(bridge);
 }
 
 bool FindInPageBridge::RegisterFindInPageBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }