OnDownloadStarted takes DownloadItem* instead of DownloadId

content/public/browser/download_url_parameters.h

Index: content/public/browser/download_url_parameters.h
diff --git a/content/public/browser/download_url_parameters.h b/content/public/browser/download_url_parameters.h
index 7df92ff3aee718b34557016a88f2f75c3f8d1cb0..6a319487deda2f422f647f0eb5247577944b5bcd 100644
--- a/content/public/browser/download_url_parameters.h
+++ b/content/public/browser/download_url_parameters.h
@@ -10,7 +10,6 @@
 
 #include "base/basictypes.h"
 #include "base/callback.h"
-#include "content/public/browser/download_id.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/common/referrer.h"
 #include "googleurl/src/gurl.h"
@@ -18,6 +17,7 @@
 
 namespace content {
 
+class DownloadItem;
 class ResourceContext;
 class ResourceDispatcherHost;
 class WebContents;
@@ -38,8 +38,8 @@ class WebContents;
 
 class CONTENT_EXPORT DownloadUrlParameters {
  public:
-  // The DownloadId will be invalid if-and-only-if there is an error.
-  typedef base::Callback<void(DownloadId, net::Error)> OnStartedCallback;
+  // If there is an error, then |item| will be NULL.
+  typedef base::Callback<void(DownloadItem*, net::Error)> OnStartedCallback;
 
   typedef std::pair<std::string, std::string> RequestHeadersNameValuePair;
   typedef std::vector<RequestHeadersNameValuePair> RequestHeadersType;