Hooked up NetLog to DownloadItem, DownloadFile, and FileStream.

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 a4bc3c852473a30632bfbcb79bb729573c2bbb51..adb59a9ca0d3cb60ead6ae1fd4a6a6d4d24d5850 100644
--- a/content/public/browser/download_manager.h
+++ b/content/public/browser/download_manager.h
@@ -52,6 +52,10 @@ struct DownloadCreateInfo;
 struct DownloadRetrieveInfo;
 struct DownloadSaveInfo;
 
+namespace net {
+class NetLog;
+}  // namespace net
+
 namespace content {
 class BrowserContext;
 class DownloadManagerDelegate;
@@ -66,7 +70,8 @@ class CONTENT_EXPORT DownloadManager
 
   static DownloadManager* Create(
       DownloadManagerDelegate* delegate,
-      DownloadStatusUpdater* status_updater);
+      DownloadStatusUpdater* status_updater,
+      net::NetLog* net_log);
 
   // Shutdown the download manager. Must be called before destruction.
   virtual void Shutdown() = 0;
@@ -252,6 +257,9 @@ class CONTENT_EXPORT DownloadManager
   virtual void SetDownloadManagerDelegate(
       content::DownloadManagerDelegate* delegate) = 0;
 
+  // Get the system net log object.
+  virtual net::NetLog* GetNetLog() = 0;
+
  protected:
   // These functions are here for unit tests.