WIP - Refactor programmatic downloads

content/public/browser/download_manager.h

Index: content/public/browser/download_manager.h
diff --git a/content/public/browser/download_manager.h b/content/public/browser/download_manager.h
index 37c6d09da908f41dfdd78294aa55213577f244e8..3700835bffa232bc1ce6a94d04fec3ec8f0282b3 100644
--- a/content/public/browser/download_manager.h
+++ b/content/public/browser/download_manager.h
@@ -101,14 +101,12 @@ class CONTENT_EXPORT DownloadManager : public base::SupportsUserData::Data {
   // clearing |downloads| first.
   virtual void GetAllDownloads(DownloadVector* downloads) = 0;
 
-  // Called by a download source (Currently DownloadResourceHandler)
-  // to initiate the non-source portions of a download.
-  // Returns the id assigned to the download.  If the DownloadCreateInfo
-  // specifies an id, that id will be used.
-  virtual void StartDownload(
-      scoped_ptr<DownloadCreateInfo> info,
-      scoped_ptr<ByteStreamReader> stream,
-      const DownloadUrlParameters::OnStartedCallback& on_started) = 0;
+  // Handles a download that's already in progress. The |request_handle|
+  // provides a handle for controlling the download. |info| specifies parameters
+  // for the new download including the ByteStreamReader.
+  virtual void StartDownloadWithActiveRequest(
+      scoped_ptr<DownloadRequestHandle> request_handle,
+      scoped_ptr<DownloadCreateInfo> info) = 0;
 
   // Remove downloads after remove_begin (inclusive) and before remove_end
   // (exclusive). You may pass in null Time values to do an unbounded delete