jni: Pass method parameters as JavaParamRef in content.

content/browser/mojo/service_registry_android.h

 // 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.
 
 #ifndef CONTENT_BROWSER_MOJO_SERVICE_REGISTRY_ANDROID_H_
 #define CONTENT_BROWSER_MOJO_SERVICE_REGISTRY_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 class ServiceRegistry;
 
 // Android wrapper over a ServiceRegistry, allowing the browser services in
 // Java to register with ServiceRegistry.java (and abstracting away the JNI
 // calls).
 class CONTENT_EXPORT ServiceRegistryAndroid {
  public:
   static bool Register(JNIEnv* env);
 
   explicit ServiceRegistryAndroid(ServiceRegistry* service_registry);
   virtual ~ServiceRegistryAndroid();
 
   // Methods called from Java.
-  void AddService(JNIEnv* env,
-                  jobject j_service_registry,
-                  jobject j_manager,
-                  jobject j_factory,
-                  jstring j_name);
-  void RemoveService(JNIEnv* env, jobject j_service_registry, jstring j_name);
-  void ConnectToRemoteService(JNIEnv* env,
-                              jobject j_service_registry,
-                              jstring j_name,
-                              jint handle);
+  void AddService(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& j_service_registry,
+      const base::android::JavaParamRef<jobject>& j_manager,
+      const base::android::JavaParamRef<jobject>& j_factory,
+      const base::android::JavaParamRef<jstring>& j_name);
+  void RemoveService(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& j_service_registry,
+      const base::android::JavaParamRef<jstring>& j_name);
+  void ConnectToRemoteService(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& j_service_registry,
+      const base::android::JavaParamRef<jstring>& j_name,
+      jint handle);
 
   const base::android::ScopedJavaGlobalRef<jobject>& GetObj() { return obj_; }
 
  private:
   ServiceRegistry* service_registry_;
   base::android::ScopedJavaGlobalRef<jobject> obj_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceRegistryAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MOJO_SERVICE_REGISTRY_ANDROID_H_