Notify native clients when Physical Web URL metadata is updated

chrome/browser/android/physical_web/physical_web_data_source_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_ANDROID_PHYSICAL_WEB_PHYSICAL_WEB_DATA_SOURCE_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_PHYSICAL_WEB_PHYSICAL_WEB_DATA_SOURCE_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 42 matching lines @@
   static bool RegisterPhysicalWebDataSource(JNIEnv* env);
 
   void Initialize();
 
   void StartDiscovery(bool network_request_enabled) override;
   void StopDiscovery() override;
 
   std::unique_ptr<base::ListValue> GetMetadata() override;
   bool HasUnresolvedDiscoveries() override;
 
+  void OnFound(JNIEnv* env,
+               const base::android::JavaParamRef<jobject>& obj,
+               const base::android::JavaParamRef<jstring>& j_url);
+  void OnLost(JNIEnv* env,
+              const base::android::JavaParamRef<jobject>& obj,
+              const base::android::JavaParamRef<jstring>& j_url);
+  void OnDistanceChanged(JNIEnv* env,
+                         const base::android::JavaParamRef<jobject>& obj,
+                         const base::android::JavaParamRef<jstring>& j_url,
+                         jdouble distance_estimate);
+
  private:
   // A reference to the Java UrlManager singleton.
   base::android::ScopedJavaGlobalRef<jobject> url_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(PhysicalWebDataSourceAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_PHYSICAL_WEB_PHYSICAL_WEB_DATA_SOURCE_ANDROID_H_