AU: Push seeks in http fetching to the progress percentage.

download_action.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "update_engine/download_action.h"
 #include <errno.h>
 #include <algorithm>
 #include <string>
 #include <vector>
 #include <glib.h>
@@ skipping 89 matching lines @@
   if (writer_) {
     LOG_IF(WARNING, writer_->Close() != 0) << "Error closing the writer.";
     writer_ = NULL;
   }
   http_fetcher_->TerminateTransfer();
   if (delegate_) {
     delegate_->SetDownloadStatus(false);  // Set to inactive.
   }
 }
 
+void DownloadAction::SeekToOffset(off_t offset) {
+  bytes_received_ = offset;
+}
+
 void DownloadAction::ReceivedBytes(HttpFetcher *fetcher,
                                    const char* bytes,
                                    int length) {
   bytes_received_ += length;
   if (delegate_)
     delegate_->BytesReceived(bytes_received_, install_plan_.size);
   if (writer_ && writer_->Write(bytes, length) < 0) {
     LOG(ERROR) << "Write error -- terminating processing.";
     TerminateProcessing();
     processor_->ActionComplete(this, kActionCodeDownloadWriteError);
@@ skipping 61 matching lines @@
 
   FlushLinuxCaches();
 
   // Write the path to the output pipe if we're successful.
   if (code == kActionCodeSuccess && HasOutputPipe())
     SetOutputObject(GetInputObject());
   processor_->ActionComplete(this, code);
 }
 
 };  // namespace {}