jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/bookmarks/partner_bookmarks_reader.cc

 // Copyright 2015 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/bookmarks/partner_bookmarks_reader.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/logging.h"
 #include "chrome/browser/android/bookmarks/partner_bookmarks_shim.h"
@@ skipping 165 matching lines @@
     const_cast<BookmarkNode*>(parent)->Add(node, parent->child_count());
   } else {
     node = new BookmarkPermanentNode(wip_next_available_id_++);
     node->SetTitle(title);
     wip_partner_bookmarks_root_.reset(node);
   }
   return node->id();
 }
 
 // static
-static void DisablePartnerBookmarksEditing(JNIEnv* env, jclass clazz) {
+static void DisablePartnerBookmarksEditing(JNIEnv* env,
+                                           const JavaParamRef<jclass>& clazz) {
   PartnerBookmarksShim::DisablePartnerBookmarksEditing();
 }
 
 // static
 bool PartnerBookmarksReader::RegisterPartnerBookmarksReader(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 // ----------------------------------------------------------------
 
-static jlong Init(JNIEnv* env, jobject obj) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   PartnerBookmarksShim* partner_bookmarks_shim =
       PartnerBookmarksShim::BuildForBrowserContext(profile);
   PartnerBookmarksReader* reader = new PartnerBookmarksReader(
       partner_bookmarks_shim, profile);
   return reinterpret_cast<intptr_t>(reader);
 }