drive: Remove unused DriveServiceInterface::TouchResource

chrome/browser/drive/drive_service_interface.h

 // Copyright (c) 2012 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_DRIVE_DRIVE_SERVICE_INTERFACE_H_
 #define CHROME_BROWSER_DRIVE_DRIVE_SERVICE_INTERFACE_H_
 
 #include <string>
 
 #include "google_apis/drive/auth_service_interface.h"
@@ skipping 238 matching lines @@
 
   // Renames a document or collection identified by its |resource_id|
   // to the UTF-8 encoded |new_title|. Upon completion,
   // invokes |callback| with results on the calling thread.
   // |callback| must not be null.
   virtual google_apis::CancelCallback RenameResource(
       const std::string& resource_id,
       const std::string& new_title,
       const google_apis::EntryActionCallback& callback) = 0;
 
-  // Touches the resource with |resource_id|.
-  // Its modifiedDate and lastViewedByMeDate fields on the server will be
-  // updated to |modified_date| and |last_viewed_by_me_date| respectively.
-  // Upon completion, invokes |callback| with the updated resource data.
-  // |modified_date|, |last_viewed_by_me_date| and |callback| must not be null.
-  virtual google_apis::CancelCallback TouchResource(
-      const std::string& resource_id,
-      const base::Time& modified_date,
-      const base::Time& last_viewed_by_me_date,
-      const google_apis::GetResourceEntryCallback& callback) = 0;
-
   // Adds a resource (document, file, or collection) identified by its
   // |resource_id| to a collection represented by the |parent_resource_id|.
   // Upon completion, invokes |callback| with results on the calling thread.
   // |callback| must not be null.
   virtual google_apis::CancelCallback AddResourceToDirectory(
       const std::string& parent_resource_id,
       const std::string& resource_id,
       const google_apis::EntryActionCallback& callback) = 0;
 
   // Removes a resource (document, file, collection) identified by its
@@ skipping 105 matching lines @@
   //
   // |callback| must not be null.
   virtual google_apis::CancelCallback GetRemainingResourceList(
       const GURL& next_link,
       const google_apis::GetResourceListCallback& callback) = 0;
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_DRIVE_DRIVE_SERVICE_INTERFACE_H_