Pass method parameters as JavaParamRef in android_webview.

android_webview/native/aw_autofill_client.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 ANDROID_WEBVIEW_NATIVE_AW_AUTOFILL_CLIENT_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_AUTOFILL_CLIENT_H_
 
 #include <jni.h>
 #include <vector>
 
@@ skipping 78 matching lines @@
   void HideAutofillPopup() override;
   bool IsAutocompleteEnabled() override;
   void PropagateAutofillPredictions(
       content::RenderFrameHost* rfh,
       const std::vector<autofill::FormStructure*>& forms) override;
   void DidFillOrPreviewField(const base::string16& autofilled_value,
                              const base::string16& profile_full_name) override;
   void OnFirstUserGestureObserved() override;
   bool IsContextSecure(const GURL& form_origin) override;
 
-  void SuggestionSelected(JNIEnv* env, jobject obj, jint position);
+  void SuggestionSelected(JNIEnv* env,
+                          const base::android::JavaParamRef<jobject>& obj,
+                          jint position);
 
  private:
   AwAutofillClient(content::WebContents* web_contents);
   friend class content::WebContentsUserData<AwAutofillClient>;
 
   void ShowAutofillPopupImpl(
       const gfx::RectF& element_bounds,
       bool is_rtl,
       const std::vector<autofill::Suggestion>& suggestions);
 
   // The web_contents associated with this delegate.
   content::WebContents* web_contents_;
   bool save_form_data_;
   JavaObjectWeakGlobalRef java_ref_;
 
   // The current Autofill query values.
   std::vector<autofill::Suggestion> suggestions_;
   base::WeakPtr<autofill::AutofillPopupDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(AwAutofillClient);
 };
 
 bool RegisterAwAutofillClient(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_AUTOFILL_CLIENT_H_