Added download error descriptions to tooltips for Mac & Linux.

chrome/browser/ui/gtk/download/download_item_gtk.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/gtk/download/download_item_gtk.h"
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/debug/trace_event.h"
 #include "base/metrics/histogram.h"
@@ skipping 317 matching lines @@
   switch (download->GetState()) {
     case DownloadItem::REMOVING:
       parent_shelf_->RemoveDownloadItem(this);  // This will delete us!
       return;
     case DownloadItem::CANCELLED:
       StopDownloadProgress();
       gtk_widget_queue_draw(progress_area_.get());
       break;
     case DownloadItem::INTERRUPTED:
       StopDownloadProgress();
+      UpdateTooltip();
 
       complete_animation_.Show();
       break;
     case DownloadItem::COMPLETE:
       // GetAutoOpened() may change after the download's initial transition to
       // COMPLETE, so we check it before the idemopotency shield below.
       if (download->GetAutoOpened()) {
         parent_shelf_->RemoveDownloadItem(this);  // This will delete us!
         return;
       }
@@ skipping 121 matching lines @@
                IconLoader::SMALL, &icon_consumer_,
                base::Bind(&DownloadItemGtk::OnLoadSmallIconComplete,
                           base::Unretained(this)));
   im->LoadIcon(icon_filepath_,
                IconLoader::LARGE, &icon_consumer_,
                base::Bind(&DownloadItemGtk::OnLoadLargeIconComplete,
                           base::Unretained(this)));
 }
 
 void DownloadItemGtk::UpdateTooltip() {
-  string16 elided_filename = ui::ElideFilename(
-      get_download()->GetFileNameToReportUser(),
-      gfx::Font(), kTooltipMaxWidth);
-  gtk_widget_set_tooltip_text(body_.get(),
-                              UTF16ToUTF8(elided_filename).c_str());
+  string16 tooltip_text = ui::ElideFilename(
+      get_download()->GetFileNameToReportUser(), gfx::Font(), kTooltipMaxWidth);
+
+  if (get_download()->GetState() == content::DownloadItem::INTERRUPTED) {
+    content::DownloadInterruptReason reason = get_download()->GetLastReason();
+    DCHECK(reason != 0);
+
+    // Add the status on another line.
+    tooltip_text += ASCIIToUTF16("\n");
+    tooltip_text += DownloadItemModel::InterruptReasonStatusMessage(reason);
+  }
+
+  gtk_widget_set_tooltip_text(body_.get(), UTF16ToUTF8(tooltip_text).c_str());
 }
 
 void DownloadItemGtk::UpdateNameLabel() {
   // TODO(estade): This is at best an educated guess, since we don't actually
   // use gfx::Font() to draw the text. This is why we need to add so
   // much padding when we set the size request. We need to either use gfx::Font
   // or somehow extend TextElider.
   gfx::Font font = gfx::Font();
   string16 filename;
   if (!disabled_while_opening_) {
@@ skipping 424 matching lines @@
   get_download()->DangerousDownloadValidated();
 }
 
 void DownloadItemGtk::OnDangerousDecline(GtkWidget* button) {
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.discard_download",
                            base::Time::Now() - creation_time_);
   if (get_download()->IsPartialDownload())
     get_download()->Cancel(true);
   get_download()->Delete(DownloadItem::DELETE_DUE_TO_USER_DISCARD);
 }