Added download error descriptions to tooltips for Mac & Linux.

chrome/browser/ui/views/download/download_item_view.cc

Index: chrome/browser/ui/views/download/download_item_view.cc
diff --git a/chrome/browser/ui/views/download/download_item_view.cc b/chrome/browser/ui/views/download/download_item_view.cc
index d722fa794a371e457f6c2a8bf24dc54e04940a06..c7b0908c9432cb005da4406be0dc110cf562226c 100644
--- a/chrome/browser/ui/views/download/download_item_view.cc
+++ b/chrome/browser/ui/views/download/download_item_view.cc
@@ -257,15 +257,14 @@ void DownloadItemView::OnDownloadUpdated(DownloadItem* download) {
   string16 old_tip = tooltip_text_;
   content::DownloadInterruptReason reason = download_->GetLastReason();
 
+  tooltip_text_ = download_->GetFileNameToReportUser().LossyDisplayName();
+
   if ((download_->GetState() == DownloadItem::INTERRUPTED) &&
       (reason != content::DOWNLOAD_INTERRUPT_REASON_USER_CANCELED)) {
-    // Use two lines: The file name, and the message.
-    tooltip_text_ = download_->GetFileNameToReportUser().LossyDisplayName();
+    // Use two lines: The file name, and the status.
     tooltip_text_ += ASCIIToUTF16("\n");
-    // The message is localized.
-    tooltip_text_ += DownloadItemModel::InterruptReasonMessage(reason);
-  } else {
-    tooltip_text_ = download_->GetFileNameToReportUser().LossyDisplayName();
+    // The status is localized.
+    tooltip_text_ += DownloadItemModel::InterruptReasonStatusMessage(reason);
   }
 
   if (IsShowingWarningDialog() && !model_->IsDangerous()) {