Don't create parallel request until download file is initialized

content/browser/download/download_item_impl.h

Index: content/browser/download/download_item_impl.h
diff --git a/content/browser/download/download_item_impl.h b/content/browser/download/download_item_impl.h
index 90dda1d3d38b68645513add228c437fddd281c36..42a4ebaa04ac4f10d7d5a2aee8db02fde30e984e 100644
--- a/content/browser/download/download_item_impl.h
+++ b/content/browser/download/download_item_impl.h
@@ -408,9 +408,6 @@ class CONTENT_EXPORT DownloadItemImpl
   // this is.
   void Init(bool active, DownloadType download_type);
 
-  // Start a series of events that result in the file being downloaded.
-  void StartDownload();
-
   // Callback from file thread when we initialize the DownloadFile.
   void OnDownloadFileInitialized(DownloadInterruptReason result);
 
@@ -507,9 +504,6 @@ class CONTENT_EXPORT DownloadItemImpl
   virtual void UpdateValidatorsOnResumption(
       const DownloadCreateInfo& new_create_info);
 
-  // Cancel a particular request that starts from |offset|.
-  void CancelRequestWithOffset(int64_t offset);
-
   static DownloadState InternalToExternalState(
       DownloadInternalState internal_state);
   static DownloadInternalState ExternalToInternalState(