Implements an UpdateClient::SendUninstallPing API for the

components/update_client/update_client.h

 // Copyright 2015 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 COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_H_
 #define COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 271 matching lines @@
   // update is attempted to give the caller the opportunity to provide the
   // instances of CrxComponent to be used for this update. The |Update| function
   // is intended to be used for background updates of several CRXs. Overlapping
   // calls to this function result in a queuing behavior, and the execution
   // of each call is serialized. In addition, updates are always queued up when
   // installs are running.
   virtual void Update(const std::vector<std::string>& ids,
                       const CrxDataCallback& crx_data_callback,
                       const CompletionCallback& completion_callback) = 0;
 
+  // Sends an uninstall ping for the CRX identified by |id| and |version|. The
+  // |reason| parameter is defined by the caller. The current implementation of
+  // this function only sends a best-effort, fire-and-forget ping. It has no
+  // other side effects regarding installs or updates done through an instance
+  // of this class.
+  virtual void SendUninstallPing(const std::string& id,
+                                 const Version& version,
+                                 int reason) = 0;
+
   // Returns status details about a CRX update. The function returns true in
   // case of success and false in case of errors, such as |id| was
   // invalid or not known.
   virtual bool GetCrxUpdateState(const std::string& id,
                                  CrxUpdateItem* update_item) const = 0;
 
   // Returns true if the |id| is found in any running task.
   virtual bool IsUpdating(const std::string& id) const = 0;
 
   // Cancels the queued updates and makes a best effort to stop updates in
   // progress as soon as possible. Some updates may not be stopped, in which
   // case, the updates will run to completion. Calling this function has no
   // effect if updates are not currently executed or queued up.
   virtual void Stop() = 0;
 
  protected:
   friend class base::RefCounted<UpdateClient>;
 
   virtual ~UpdateClient() {}
 };
 
 // Creates an instance of the update client.
 scoped_refptr<UpdateClient> UpdateClientFactory(
     const scoped_refptr<Configurator>& config);
 
 }  // namespace update_client
 
 #endif  // COMPONENTS_UPDATE_CLIENT_UPDATE_CLIENT_H_