Add request header on gdata operation for testing ETag match.

chrome/browser/google_apis/gdata_wapi_service.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_GOOGLE_APIS_GDATA_WAPI_SERVICE_H_
 #define CHROME_BROWSER_GOOGLE_APIS_GDATA_WAPI_SERVICE_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 50 matching lines @@
   virtual void GetDocumentEntry
   (const std::string& resource_id,
    const gdata::GetDataCallback& callback) OVERRIDE;
 
   virtual void GetAccountMetadata(
       const gdata::GetDataCallback& callback) OVERRIDE;
   virtual void GetApplicationInfo(
       const gdata::GetDataCallback& callback) OVERRIDE;
   virtual void DeleteDocument(
       const GURL& document_url,
+      const std::string& etag,
       const gdata::EntryActionCallback& callback) OVERRIDE;
   virtual void DownloadDocument(
       const FilePath& virtual_path,
       const FilePath& local_cache_path,
       const GURL& content_url,
       DocumentExportFormat format,
+      const std::string& etag,
       const gdata::DownloadActionCallback& callback) OVERRIDE;
   virtual void DownloadFile(
       const FilePath& virtual_path,
       const FilePath& local_cache_path,
       const GURL& content_url,
+      const std::string& etag,
       const gdata::DownloadActionCallback& download_action_callback,
       const gdata::GetContentCallback& get_content_callback) OVERRIDE;
   virtual void CopyDocument(const std::string& resource_id,
                             const FilePath::StringType& new_name,
                             const gdata::GetDataCallback& callback) OVERRIDE;
   virtual void RenameResource(
       const GURL& document_url,
       const FilePath::StringType& new_name,
       const gdata::EntryActionCallback& callback) OVERRIDE;
   virtual void AddResourceToDirectory(
@@ skipping 32 matching lines @@
 
   scoped_ptr<gdata::OperationRunner> runner_;
   ObserverList<DriveServiceObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataWapiService);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_GDATA_WAPI_SERVICE_H_