[downloads] Move platform specific code out of DownloadTargetDeterminer.

content/browser/download/download_item_impl_delegate.h

Index: content/browser/download/download_item_impl_delegate.h
diff --git a/content/browser/download/download_item_impl_delegate.h b/content/browser/download/download_item_impl_delegate.h
index 5c3805988749674383db474d80a135663fcd3a8f..c36f9c5db756cd575ccee067476e92710c55333c 100644
--- a/content/browser/download/download_item_impl_delegate.h
+++ b/content/browser/download/download_item_impl_delegate.h
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/download_danger_type.h"
+#include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_url_parameters.h"
 
@@ -29,8 +30,9 @@ class CONTENT_EXPORT DownloadItemImplDelegate {
       const base::FilePath&,            // Target path
       DownloadItem::TargetDisposition,  // overwrite/uniquify target
       DownloadDangerType,
-      const base::FilePath&             // Intermediate file path
-                              )> DownloadTargetCallback;
+      const base::FilePath&,  // Intermediate file path
+      DownloadInterruptReason)>
+      DownloadTargetCallback;
 
   // The boolean argument indicates whether or not the download was
   // actually opened.