Show download interrupt reason in a tooltip

chrome/browser/download/download_item_model.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/download/download_item_model.h"
 
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/rtl.h"
 #include "base/string16.h"
 #include "base/sys_string_conversions.h"
@@ skipping 132 matching lines @@
       if (reason != content::DOWNLOAD_INTERRUPT_REASON_USER_CANCELED)
         status_text = size_text + status_text;
       break;
     default:
       NOTREACHED();
   }
 
   return status_text;
 }
 
+string16 DownloadItemModel::GetTooltipText(const gfx::Font& font,
+                                           int max_width) const {
+  string16 tooltip = ui::ElideFilename(
+      download_->GetFileNameToReportUser(), font, max_width);
+  content::DownloadInterruptReason reason = download_->GetLastReason();
+  if (download_->GetState() == DownloadItem::INTERRUPTED &&
+      reason != content::DOWNLOAD_INTERRUPT_REASON_USER_CANCELED) {
+    tooltip += ASCIIToUTF16("\n");
+    tooltip += ui::ElideText(InterruptReasonStatusMessage(reason),
+                             font, max_width, ui::ELIDE_AT_END);
+  }
+  return tooltip;
+}
+
 int DownloadItemModel::PercentComplete() const {
 #if defined(OS_CHROMEOS)
   // For GData uploads, progress is based on the number of bytes
   // uploaded. Progress is unknown until the upload starts.
   if (gdata::GDataDownloadObserver::IsGDataDownload(download_))
     return gdata::GDataDownloadObserver::PercentComplete(download_);
 #endif
   return download_->PercentComplete();
 }
 
@@ skipping 183 matching lines @@
       break;
     default:
       string_id = IDS_DOWNLOAD_INTERRUPTED_STATUS;
       break;
   }
 
   status_text = l10n_util::GetStringUTF16(string_id);
 
   return status_text;
 }