Download resumption - Preliminary

chrome/browser/download/chrome_download_manager_delegate.cc

Index: chrome/browser/download/chrome_download_manager_delegate.cc
diff --git a/chrome/browser/download/chrome_download_manager_delegate.cc b/chrome/browser/download/chrome_download_manager_delegate.cc
index a142d12738a2608964ecf831a313f03909738d22..d7b9722ca5e46ed15e2c3c48fab8d2078f57b235 100644
--- a/chrome/browser/download/chrome_download_manager_delegate.cc
+++ b/chrome/browser/download/chrome_download_manager_delegate.cc
@@ -256,6 +256,22 @@ FilePath ChromeDownloadManagerDelegate::GetIntermediatePath(
   return dir.Append(file_name);
 }
 
+int64 ChromeDownloadManagerDelegate::GetIntermediateFileLength(
+    const FilePath& path, bool temporary) {
+  // Get the intermediate file name.
+  FilePath crpath = path;
+
+  if (!temporary)
+    crpath = download_util::GetCrDownloadPath(path);
+
+  // Validate the start offset.
+  int64 end = 0;
+  if (file_util::GetFileSize(crpath, &end))
+    return end;
+
+  return 0;
+}
+
 WebContents* ChromeDownloadManagerDelegate::
     GetAlternativeWebContentsToNotifyForDownload() {
 #if defined(OS_ANDROID)