jni_generator: Make all object-returning natives return ScopedJavaLocalRef.

android_webview/native/aw_settings.cc

 // Copyright (c) 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 "android_webview/native/aw_settings.h"
 
 #include "android_webview/browser/renderer_host/aw_render_view_host_ext.h"
 #include "android_webview/common/aw_content_client.h"
 #include "android_webview/native/aw_contents.h"
 #include "base/android/jni_android.h"
@@ skipping 411 matching lines @@
 
 static jlong Init(JNIEnv* env,
                   jobject obj,
                   jobject web_contents) {
   content::WebContents* contents = content::WebContents::FromJavaWebContents(
       web_contents);
   AwSettings* settings = new AwSettings(env, obj, contents);
   return reinterpret_cast<intptr_t>(settings);
 }
 
-static jstring GetDefaultUserAgent(JNIEnv* env, jclass clazz) {
-  return base::android::ConvertUTF8ToJavaString(env, GetUserAgent()).Release();
+static ScopedJavaLocalRef<jstring> GetDefaultUserAgent(JNIEnv* env,
+                                                       jclass clazz) {
+  return base::android::ConvertUTF8ToJavaString(env, GetUserAgent());
 }
 
 bool RegisterAwSettings(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android_webview