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

chrome/browser/ui/android/infobars/generated_password_saved_infobar.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_INFOBARS_GENERATED_PASSWORD_SAVED_INFOBAR_H_
 #define CHROME_BROWSER_UI_ANDROID_INFOBARS_GENERATED_PASSWORD_SAVED_INFOBAR_H_
 
 #include <jni.h>
 
 #include <string>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/password_manager/generated_password_saved_infobar_delegate_android.h"
 #include "chrome/browser/ui/android/infobars/infobar_android.h"
 
 // The Android infobar that notifies that the generated password was saved.
 class GeneratedPasswordSavedInfoBar : public InfoBarAndroid {
  public:
   explicit GeneratedPasswordSavedInfoBar(
       scoped_ptr<GeneratedPasswordSavedInfoBarDelegateAndroid> delegate);
   ~GeneratedPasswordSavedInfoBar() override;
 
  private:
   // InfoBarAndroid implementation:
   base::android::ScopedJavaLocalRef<jobject> CreateRenderInfoBar(
       JNIEnv* env) override;
-  void OnLinkClicked(JNIEnv* env, jobject obj) override;
+  void OnLinkClicked(JNIEnv* env,
+                     const base::android::JavaParamRef<jobject>& obj) override;
   void ProcessButton(int action) override;
 
   DISALLOW_COPY_AND_ASSIGN(GeneratedPasswordSavedInfoBar);
 };
 
 // Registers native methods.
 bool RegisterGeneratedPasswordSavedInfoBarDelegate(JNIEnv* env);
 
 #endif  // CHROME_BROWSER_UI_ANDROID_INFOBARS_GENERATED_PASSWORD_SAVED_INFOBAR_H_