jni_generator: Pass object parameters as JavaParamRef.

chrome/browser/android/compositor/compositor_view.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/compositor/compositor_view.h"
 
 #include <vector>
 
 #include <android/bitmap.h>
 #include <android/native_window_jni.h>
@@ skipping 23 matching lines @@
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/android/resources/resource_manager.h"
 #include "ui/android/resources/ui_resource_provider.h"
 #include "ui/android/window_android.h"
 #include "ui/gfx/android/java_bitmap.h"
 
 namespace chrome {
 namespace android {
 
 jlong Init(JNIEnv* env,
-           jobject obj,
+           const JavaParamRef<jobject>& obj,
            jboolean low_mem_device,
            jint empty_background_color,
            jlong native_window_android,
-           jobject jlayer_title_cache,
-           jobject jtab_content_manager) {
+           const JavaParamRef<jobject>& jlayer_title_cache,
+           const JavaParamRef<jobject>& jtab_content_manager) {
   CompositorView* view;
   ui::WindowAndroid* window_android =
       reinterpret_cast<ui::WindowAndroid*>(native_window_android);
   LayerTitleCache* layer_title_cache =
       LayerTitleCache::FromJavaObject(jlayer_title_cache);
   TabContentManager* tab_content_manager =
       TabContentManager::FromJavaObject(jtab_content_manager);
 
   DCHECK(tab_content_manager);
 
@@ skipping 262 matching lines @@
   // through here but through BrowserChildProcessHostDisconnected() instead.
 }
 
 // Register native methods
 bool RegisterCompositorView(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome