Pass JavaRef to WebContents::FromJavaWebContents.

chrome/browser/net/spdyproxy/data_reduction_promo_infobar_delegate_android.h

 // Copyright 2016 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_NET_SPDYPROXY_DATA_REDUCTION_PROMO_INFOBAR_DELEGATE_ANDROID_H_
 #define CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROMO_INFOBAR_DELEGATE_ANDROID_H_
 
 #include <memory>
 
 #include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/infobars/core/infobar_delegate.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace infobars {
 class InfoBarManager;
 }
 
 // An infobar that prompts the user to enable the data reduction proxy.
 class DataReductionPromoInfoBarDelegateAndroid : public ConfirmInfoBarDelegate {
  public:
   // Creates the infobar and adds it to the provided |web_contents|.
   static void Create(content::WebContents* web_contents);
 
   DataReductionPromoInfoBarDelegateAndroid();
   ~DataReductionPromoInfoBarDelegateAndroid() override;
 
   static bool Register(JNIEnv* env);
 
   static void Launch(JNIEnv* env,
-                     jclass,
-                     jobject jweb_contents);
+                     const base::android::JavaRef<jobject>& jweb_contents);
 
   base::android::ScopedJavaLocalRef<jobject> CreateRenderInfoBar(JNIEnv* env);
 
  private:
   // Returns a Data Reduction Proxy infobar that owns |delegate|.
   static std::unique_ptr<infobars::InfoBar> CreateInfoBar(
       infobars::InfoBarManager* infobar_manager,
       std::unique_ptr<DataReductionPromoInfoBarDelegateAndroid> delegate);
 
   // ConfirmInfoBarDelegate:
   infobars::InfoBarDelegate::InfoBarIdentifier GetIdentifier() const override;
   base::string16 GetMessageText() const override;
   bool Accept() override;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionPromoInfoBarDelegateAndroid);
 };
 
 #endif  // CHROME_BROWSER_NET_SPDYPROXY_DATA_REDUCTION_PROMO_INFOBAR_DELEGATE_ANDROID_H_