Adds the new URLRequest::OnBeforeNetworkStart hook to the

content/browser/download/download_resource_handler.h

Index: content/browser/download/download_resource_handler.h
diff --git a/content/browser/download/download_resource_handler.h b/content/browser/download/download_resource_handler.h
index 36bb0d270053c49dd24f59209991d53968cbd47c..138d93e73a7d70cac98671156c1147adf039586c 100644
--- a/content/browser/download/download_resource_handler.h
+++ b/content/browser/download/download_resource_handler.h
@@ -64,6 +64,11 @@ class CONTENT_EXPORT DownloadResourceHandler
                            const GURL& url,
                            bool* defer) OVERRIDE;
 
+  // Pass-through implementation.
+  virtual bool OnBeforeNetworkStart(int request_id,
+                                    const GURL& url,
+                                    bool* defer) OVERRIDE;
+
   // Create a new buffer, which will be handed to the download thread for file
   // writing and deletion.
   virtual bool OnWillRead(int request_id,