jni: Pass method parameters as JavaParamRef in chrome/browser/ui.

chrome/browser/ui/android/autofill/credit_card_scanner_view_android.cc

 // 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.
 
 #include "chrome/browser/ui/android/autofill/credit_card_scanner_view_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/android/window_android_helper.h"
@@ skipping 33 matching lines @@
     : delegate_(delegate),
       java_object_(Java_CreditCardScanner_create(
           base::android::AttachCurrentThread(),
           reinterpret_cast<intptr_t>(this),
           base::android::GetApplicationContext(),
           WindowAndroidHelper::FromWebContents(web_contents)
               ->GetWindowAndroid()->GetJavaObject().obj())) {}
 
 CreditCardScannerViewAndroid::~CreditCardScannerViewAndroid() {}
 
-void CreditCardScannerViewAndroid::ScanCancelled(JNIEnv* env, jobject object) {
+void CreditCardScannerViewAndroid::ScanCancelled(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& object) {
   delegate_->ScanCancelled();
 }
 
-void CreditCardScannerViewAndroid::ScanCompleted(JNIEnv* env,
-                                                 jobject object,
-                                                 jstring card_number,
-                                                 jint expiration_month,
-                                                 jint expiration_year) {
+void CreditCardScannerViewAndroid::ScanCompleted(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& object,
+    const JavaParamRef<jstring>& card_number,
+    jint expiration_month,
+    jint expiration_year) {
   delegate_->ScanCompleted(
       base::android::ConvertJavaStringToUTF16(env, card_number),
       static_cast<int>(expiration_month), static_cast<int>(expiration_year));
 }
 
 void CreditCardScannerViewAndroid::Show() {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_CreditCardScanner_scan(env, java_object_.obj());
 }
 
 }  // namespace autofill