[downloads] Move platform specific code out of DownloadTargetDeterminer.

content/browser/download/mock_download_item_impl.h

Index: content/browser/download/mock_download_item_impl.h
diff --git a/content/browser/download/mock_download_item_impl.h b/content/browser/download/mock_download_item_impl.h
index f7aa52e2596881fc0df6ebd632f7391a2fbf8ebe..f0bedb0a6d94ad1e7dec1113ce80720e47ba2655 100644
--- a/content/browser/download/mock_download_item_impl.h
+++ b/content/browser/download/mock_download_item_impl.h
@@ -26,11 +26,12 @@ class MockDownloadItemImpl : public DownloadItemImpl {
                        const DownloadItem::ReceivedSlices& received_slices);
   ~MockDownloadItemImpl() override;
 
-  MOCK_METHOD4(OnDownloadTargetDetermined,
+  MOCK_METHOD5(OnDownloadTargetDetermined,
                void(const base::FilePath&,
                     TargetDisposition,
                     DownloadDangerType,
-                    const base::FilePath&));
+                    const base::FilePath&,
+                    DownloadInterruptReason));
   MOCK_METHOD1(AddObserver, void(DownloadItem::Observer*));
   MOCK_METHOD1(RemoveObserver, void(DownloadItem::Observer*));
   MOCK_METHOD0(UpdateObservers, void());