Add callback for upload progress in Drive service and operation layer.

chrome/browser/google_apis/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_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_
 #define CHROME_BROWSER_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_
 
 #include <string>
 
 // TODO(kochi): Further split gdata_operations.h and include only necessary
@@ skipping 61 matching lines @@
 typedef base::Callback<void(
     const UploadRangeResponse& response,
     scoped_ptr<ResourceEntry> new_entry)> UploadRangeCallback;
 
 // Callback used for AuthorizeApp(). |open_url| is used to open the target
 // file with the authorized app.
 typedef base::Callback<void(GDataErrorCode error,
                             const GURL& open_url)>
     AuthorizeAppCallback;
 
+// Callback used for ResumeUpload().
+typedef base::Callback<void(int64 progress)> ProgressCallback;
+
 // This defines an interface for sharing by DriveService and MockDriveService
 // so that we can do testing of clients of DriveService.
 //
 // All functions must be called on UI thread. DriveService is built on top of
 // URLFetcher that runs on UI thread.
 class DriveServiceInterface {
  public:
   virtual ~DriveServiceInterface() {}
 
   // Common service:
@@ skipping 250 matching lines @@
   // |callback| must not be null.
   virtual void InitiateUploadExistingFile(
       const base::FilePath& drive_file_path,
       const std::string& content_type,
       int64 content_length,
       const std::string& resource_id,
       const std::string& etag,
       const InitiateUploadCallback& callback) = 0;
 
   // Resumes uploading of a document/file on the calling thread.
-  // |callback| must not be null.
+  // |callback| must not be null. |progress_callback| may be null.
   virtual void ResumeUpload(
       UploadMode upload_mode,
       const base::FilePath& drive_file_path,
       const GURL& upload_url,
       int64 start_position,
       int64 end_position,
       int64 content_length,
       const std::string& content_type,
       const scoped_refptr<net::IOBuffer>& buf,
-      const UploadRangeCallback& callback) = 0;
+      const UploadRangeCallback& callback,
+      const ProgressCallback& progress_callback) = 0;
 
   // Gets the current status of the uploading to |upload_url| from the server.
   // |upload_mode|, |drive_file_path| and |content_length| should be set to
   // the same value which is used for ResumeUpload.
   // |callback| must not be null.
   virtual void GetUploadStatus(
       UploadMode upload_mode,
       const base::FilePath& drive_file_path,
       const GURL& upload_url,
       int64 content_length,
       const UploadRangeCallback& callback) = 0;
 
   // Authorizes a Drive app with the id |app_id| to open the given file.
   // Upon completion, invokes |callback| with the link to open the file with
   // the provided app. |callback| must not be null.
   virtual void AuthorizeApp(const std::string& resource_id,
                             const std::string& app_id,
                             const AuthorizeAppCallback& callback) = 0;
 };
 
 }  // namespace google_apis
 
 #endif  // CHROME_BROWSER_GOOGLE_APIS_DRIVE_SERVICE_INTERFACE_H_