Replace the DownloadFileManager with direct ownership of DownloadFileImpl

content/public/test/mock_download_manager.h

Index: content/public/test/mock_download_manager.h
diff --git a/content/public/test/mock_download_manager.h b/content/public/test/mock_download_manager.h
index aff89ecade3f3f858e3208582e1254de7fbbb8ce..a80012015f2dccff5cdfa4a573f82c9fe690aa52 100644
--- a/content/public/test/mock_download_manager.h
+++ b/content/public/test/mock_download_manager.h
@@ -35,17 +35,7 @@ class MockDownloadManager : public DownloadManager {
 
   MOCK_METHOD2(MockStartDownload,
                DownloadItem*(DownloadCreateInfo*, ByteStreamReader*));
-  MOCK_METHOD4(UpdateDownload, void(int32 download_id,
-                                    int64 bytes_so_far,
-                                    int64 bytes_per_sec,
-                                    const std::string& hash_state));
-  MOCK_METHOD3(OnResponseCompleted, void(int32 download_id,
-                                         int64 size,
-                                         const std::string& hash));
   MOCK_METHOD1(CancelDownload, void(int32 download_id));
-  MOCK_METHOD2(OnDownloadInterrupted,
-               void(int32 download_id,
-                    DownloadInterruptReason reason));
   MOCK_METHOD2(RemoveDownloadsBetween, int(base::Time remove_begin,
                                            base::Time remove_end));
   MOCK_METHOD1(RemoveDownloads, int(base::Time remove_begin));