Added download error descriptions to tooltips for Mac & Linux.

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

 // 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.
 
 #include "chrome/browser/ui/views/download/download_item_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 239 matching lines @@
 // DownloadObserver interface.
 
 // Update the progress graphic on the icon and our text status label
 // to reflect our current bytes downloaded, time remaining.
 void DownloadItemView::OnDownloadUpdated(DownloadItem* download) {
   DCHECK(download == 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()) {
     // We have been approved.
     ClearWarningDialog();
   } else if (!IsShowingWarningDialog() && model_->IsDangerous()) {
     ShowWarningDialog();
     // Force the shelf to layout again as our size has changed.
     parent_->Layout();
     SchedulePaint();
@@ skipping 909 matching lines @@
     // Drop down button is glued to the left of the download shelf.
     drop_down_x_left_ = 0;
     drop_down_x_right_ = normal_drop_down_image_set_.top->width();
   } else {
     // Drop down button is glued to the right of the download shelf.
     drop_down_x_left_ =
       size.width() - normal_drop_down_image_set_.top->width();
     drop_down_x_right_ = size.width();
   }
 }