Add GetUploadStatus method to the DriveServiceInterface.

chrome/browser/google_apis/drive_service_interface.h

Index: chrome/browser/google_apis/drive_service_interface.h
diff --git a/chrome/browser/google_apis/drive_service_interface.h b/chrome/browser/google_apis/drive_service_interface.h
index 05f7712bc8d1dd0a1a95690e14eeebdc77f9f255..1d07a3f6475844df33c0c363bad45cbc51376840 100644
--- a/chrome/browser/google_apis/drive_service_interface.h
+++ b/chrome/browser/google_apis/drive_service_interface.h
@@ -240,7 +240,18 @@ class DriveServiceInterface {
   // Resumes uploading of a document/file on the calling thread.
   // |callback| must not be null.
   virtual void ResumeUpload(const ResumeUploadParams& params,
-                            const ResumeUploadCallback& callback) = 0;
+                            const UploadRangeCallback& 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 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