jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/favicon_helper.cc

 // Copyright 2013 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/favicon_helper.h"
 
 #include <jni.h>
 
 #include <vector>
 
@@ skipping 125 matching lines @@
   }
 
   web_contents->DownloadImage(favicon_url, true, 0, false,
                               base::Bind(OnFaviconDownloaded,
                                          j_availability_callback,
                                          profile, page_url));
 }
 
 }  // namespace
 
-static jlong Init(JNIEnv* env, jclass clazz) {
+static jlong Init(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
   return reinterpret_cast<intptr_t>(new FaviconHelper());
 }
 
 FaviconHelper::FaviconHelper() {
   cancelable_task_tracker_.reset(new base::CancelableTaskTracker());
 }
 
 void FaviconHelper::Destroy(JNIEnv* env, jobject obj) {
   delete this;
 }
@@ skipping 130 matching lines @@
                  profile, web_contents, page_url, favicon_url);
   favicon::FaviconService* service = FaviconServiceFactory::GetForProfile(
       profile, ServiceAccessType::IMPLICIT_ACCESS);
   service->GetFaviconImageForPageURL(page_url, callback_runner,
                                      cancelable_task_tracker_.get());
 }
 
 FaviconHelper::~FaviconHelper() {}
 
 static jint GetDominantColorForBitmap(JNIEnv* env,
-                                      jclass clazz,
-                                      jobject bitmap) {
+                                      const JavaParamRef<jclass>& clazz,
+                                      const JavaParamRef<jobject>& bitmap) {
   if (!bitmap)
     return 0;
 
   gfx::JavaBitmap bitmap_lock(bitmap);
   SkBitmap skbitmap = gfx::CreateSkBitmapFromJavaBitmap(bitmap_lock);
   return color_utils::CalculateKMeanColorOfBitmap(skbitmap);
 }
 
 // static
 bool FaviconHelper::RegisterFaviconHelper(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }