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

chrome/browser/ui/android/autofill/credit_card_scanner_view_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 CHROME_BROWSER_UI_ANDROID_AUTOFILL_CREDIT_CARD_SCANNER_VIEW_ANDROID_H_
 #define CHROME_BROWSER_UI_ANDROID_AUTOFILL_CREDIT_CARD_SCANNER_VIEW_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 15 matching lines @@
  public:
   // Registers with JNI services.
   static bool Register(JNIEnv* env);
 
   CreditCardScannerViewAndroid(
       const base::WeakPtr<CreditCardScannerViewDelegate>& delegate,
       content::WebContents* web_contents);
   ~CreditCardScannerViewAndroid() override;
 
   // Called by JNI when user cancelled credit card scan.
-  void ScanCancelled(JNIEnv* env, jobject object);
+  void ScanCancelled(JNIEnv* env,
+                     const base::android::JavaParamRef<jobject>& object);
 
   // Called by JNI when credit card scan completed successfully.
   void ScanCompleted(JNIEnv* env,
-                     jobject object,
-                     jstring card_number,
+                     const base::android::JavaParamRef<jobject>& object,
+                     const base::android::JavaParamRef<jstring>& card_number,
                      jint expiration_month,
                      jint expiration_year);
+
  private:
   // CreditCardScannerView implementation.
   void Show() override;
 
   // The object to be notified when scanning was cancelled or completed.
   base::WeakPtr<CreditCardScannerViewDelegate> delegate_;
 
   // The corresponding Java object that uses Android APIs for scanning.
   base::android::ScopedJavaGlobalRef<jobject> java_object_;
 
   DISALLOW_COPY_AND_ASSIGN(CreditCardScannerViewAndroid);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_ANDROID_AUTOFILL_CREDIT_CARD_SCANNER_VIEW_ANDROID_H_