Flesh out URLLoader's download_to_file function....

chrome/common/resource_dispatcher.h

Index: chrome/common/resource_dispatcher.h
===================================================================
--- chrome/common/resource_dispatcher.h	(revision 60837)
+++ chrome/common/resource_dispatcher.h	(working copy)
@@ -82,6 +82,10 @@
   };
   typedef base::hash_map<int, PendingRequestInfo> PendingRequestList;
 
+  // Helper to lookup the info based on the request_id.
+  // May return NULL if the request as been canceled from the client side.
+  PendingRequestInfo* GetPendingRequestInfo(int request_id);
+
   // Message response handlers, called by the message handler for this process.
   void OnUploadProgress(
       const IPC::Message& message,
@@ -100,6 +104,10 @@
       int request_id,
       base::SharedMemoryHandle data,
       int data_len);
+  void OnDownloadedData(
+      const IPC::Message& message,
+      int request_id,
+      int data_len);
   void OnRequestComplete(
       int request_id,
       const URLRequestStatus& status,