Add ProgressCallback to DriveServiceInterface::DownloadFile.

chrome/browser/google_apis/base_operations.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.
 //
 // This file provides base classes used to implement operations for Google APIs.
 
 #ifndef CHROME_BROWSER_GOOGLE_APIS_BASE_OPERATIONS_H_
 #define CHROME_BROWSER_GOOGLE_APIS_BASE_OPERATIONS_H_
 
 #include <string>
@@ skipping 16 matching lines @@
 class IOBuffer;
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace google_apis {
 
 // Callback used to pass parsed JSON from ParseJson(). If parsing error occurs,
 // then the passed argument is null.
 typedef base::Callback<void(scoped_ptr<base::Value> value)> ParseJsonCallback;
 
+// Callback used for DownloadOperation and ResumeUploadOperation.
+typedef base::Callback<void(int64 progress, int64 total)> ProgressCallback;
+
 // Parses JSON passed in |json| on blocking pool. Runs |callback| on the calling
 // thread when finished with either success or failure.
 // The callback must not be null.
 void ParseJson(const std::string& json, const ParseJsonCallback& callback);
 
 //======================= AuthenticatedOperationInterface ======================
 
 // An interface class for implementing an operation which requires OAuth2
 // authentication.
 class AuthenticatedOperationInterface {
@@ skipping 404 matching lines @@
 // This class performs the operation for downloading of a given document/file.
 class DownloadFileOperation : public UrlFetchOperationBase {
  public:
   // download_action_callback:
   //   This callback is called when the download is complete. Must not be null.
   //
   // get_content_callback:
   //   This callback is called when some part of the content is
   //   read. Used to read the download content progressively. May be null.
   //
+  // progress_callback:
+  //   This callback is called for periodically reporting the number of bytes
+  //   downloaded so far. May be null.
+  //
   // download_url:
   //   Specifies the target file to download.
   //
   // drive_file_path:
   //   Specifies the drive path of the target file. Shown in UI.
   //   TODO(satorux): Remove the drive file path hack. crbug.com/163296
   //
   // output_file_path:
   //   Specifies the file path to save the downloaded file.
   //
   DownloadFileOperation(
       OperationRegistry* registry,
       net::URLRequestContextGetter* url_request_context_getter,
       const DownloadActionCallback& download_action_callback,
       const GetContentCallback& get_content_callback,
+      const ProgressCallback& progress_callback,
       const GURL& download_url,
       const base::FilePath& drive_file_path,
       const base::FilePath& output_file_path);
   virtual ~DownloadFileOperation();
 
  protected:
   // UrlFetchOperationBase overrides.
   virtual GURL GetURL() const OVERRIDE;
   virtual void ProcessURLFetchResults(const net::URLFetcher* source) OVERRIDE;
   virtual void RunCallbackOnPrematureFailure(GDataErrorCode code) OVERRIDE;
 
   // net::URLFetcherDelegate overrides.
   virtual void OnURLFetchDownloadProgress(const net::URLFetcher* source,
                                           int64 current, int64 total) OVERRIDE;
   virtual bool ShouldSendDownloadData() OVERRIDE;
   virtual void OnURLFetchDownloadData(
       const net::URLFetcher* source,
       scoped_ptr<std::string> download_data) OVERRIDE;
 
  private:
   const DownloadActionCallback download_action_callback_;
   const GetContentCallback get_content_callback_;
+  const ProgressCallback progress_callback_;
   const GURL download_url_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileOperation);
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_BASE_OPERATIONS_H_