jni: Pass method parameters as JavaParamRef in content.

content/browser/android/interstitial_page_delegate_android.h

 // Copyright (c) 2012 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_ANDROID_INTERSTITIAL_PAGE_DELEGATE_ANDROID_H_
 #define CONTENT_BROWSER_ANDROID_INTERSTITIAL_PAGE_DELEGATE_ANDROID_H_
 
 #include <jni.h>
 #include <string>
 
@@ skipping 13 matching lines @@
 class InterstitialPageDelegateAndroid : public InterstitialPageDelegate {
  public:
   InterstitialPageDelegateAndroid(JNIEnv* env,
                                   jobject obj,
                                   const std::string& html_content);
   ~InterstitialPageDelegateAndroid() override;
 
   void set_interstitial_page(InterstitialPage* page) { page_ = page; }
 
   // Methods called from Java.
-  void Proceed(JNIEnv* env, jobject obj);
-  void DontProceed(JNIEnv* env, jobject obj);
+  void Proceed(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void DontProceed(JNIEnv* env,
+                   const base::android::JavaParamRef<jobject>& obj);
 
   // Implementation of InterstitialPageDelegate
   std::string GetHTMLContents() override;
   void OnProceed() override;
   void OnDontProceed() override;
   void CommandReceived(const std::string& command) override;
 
   static bool RegisterInterstitialPageDelegateAndroid(JNIEnv* env);
 
  private:
   JavaObjectWeakGlobalRef weak_java_obj_;
 
   std::string html_content_;
   InterstitialPage* page_;  // Owns this.
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageDelegateAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_INTERSTITIAL_PAGE_DELEGATE_ANDROID_H_