Dispatch encoded_data_length separately in content/child

chrome/renderer/extensions/extension_localization_peer.h

Index: chrome/renderer/extensions/extension_localization_peer.h
diff --git a/chrome/renderer/extensions/extension_localization_peer.h b/chrome/renderer/extensions/extension_localization_peer.h
index d7544dad8403a297c6ce68f2c9899b98cfe5e7cc..4d9f16d3df9aaa61aa0546e5b15b20f4c0444c4e 100644
--- a/chrome/renderer/extensions/extension_localization_peer.h
+++ b/chrome/renderer/extensions/extension_localization_peer.h
@@ -42,6 +42,7 @@ class ExtensionLocalizationPeer : public content::RequestPeer {
   void OnReceivedResponse(const content::ResourceResponseInfo& info) override;
   void OnDownloadedData(int len, int encoded_data_length) override {}
   void OnReceivedData(std::unique_ptr<ReceivedData> data) override;
+  void OnTransferSizeUpdated(int transfer_size_diff) override;
   void OnCompletedRequest(int error_code,
                           bool was_ignored_by_handler,
                           bool stale_copy_in_cache,