Pass method parameters as JavaParamRef in android_webview.

android_webview/native/permission/aw_permission_request.h

Index: android_webview/native/permission/aw_permission_request.h
diff --git a/android_webview/native/permission/aw_permission_request.h b/android_webview/native/permission/aw_permission_request.h
index d146538a437b6da3450b8c451ff4efa53155bd13..f016799fade1882cb92c7cdb1bf84cd1eaeed253 100644
--- a/android_webview/native/permission/aw_permission_request.h
+++ b/android_webview/native/permission/aw_permission_request.h
@@ -41,8 +41,10 @@ class AwPermissionRequest {
 
   // Invoked by Java peer when request is processed, |granted| indicates the
   // request was granted or not.
-  void OnAccept(JNIEnv* env, jobject jcaller, jboolean granted);
-  void Destroy(JNIEnv* env, jobject obj);
+  void OnAccept(JNIEnv* env,
+                const base::android::JavaParamRef<jobject>& jcaller,
+                jboolean granted);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
   // Return the origin which initiated the request.
   const GURL& GetOrigin();