Hooked up NetLog to DownloadItem, DownloadFile, and FileStream.

The ChromeNetLog object is owned by the browser process, which has a longer lifetime than the profile and therefore than the download system.  For each download, there will be one BoundNetLog (or a copy thereof) used by DownloadItem and DownloadFile, and one separate one used by FileStream.

For most downloads, the path to get a NetLog pointer to the download objects (DownloadItem, DownloadFile and FileStream) is through the URL request.  A BoundNetLog is created and passed in to the DownloadResourceHandler constructor, which adds it to a DownloadCreateInfo that it makes.  This gets it to DownloadItem, DownloadFile/BaseFile, and FileStream.

For downloads created from the history database, the path is via the DownloadService and the DownloadManager constructor.  Likewise for downloads created as part of a 'Save Page As' operation, although that may change in the future with further refactoring of the 'Save Page As' code.

For downloads initiated by drag & drop on Linux and Mac (but not on Windows), the FileStream needs to get a NetLog pointer from another source.  In this case, it is via the ContentClient (effectively a global) and ContentBrowserClient classes.

Note that FileStream has a different NetLog source than the other classes.

This is the final of 4 CLs that will enable net logging for downloads.

BUG=None
TEST=Go to a web page with downloadable content.
Open a new tab with about:net-internals.
Download a file.
Check the EVENTS tab of about:net-internals:  there should be DOWNLOAD and FILESTREAM events.


Review URL: http://codereview.chromium.org/9296012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121050 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 0 deletions

diff --git a/content/browser/download/download_item_impl.cc b/content/browser/download/download_item_impl.cc
index cdcd10e..03b1a0e 100644
--- a/content/browser/download/download_item_impl.cc
+++ b/content/browser/download/download_item_impl.cc
@@ -242,6 +242,19 @@ DownloadItemImpl::DownloadItemImpl(
   delegate_->Attach();
   Init(true /* actively downloading */,
        download_net_logs::SRC_NEW_DOWNLOAD);
+
+  // Link the event sources.
+  bound_net_log_.AddEvent(
+      net::NetLog::TYPE_DOWNLOAD_URL_REQUEST,
+      make_scoped_refptr(new net::NetLogSourceParameter(
+          "source_dependency",
+          info.request_bound_net_log.source())));
+
+  info.request_bound_net_log.AddEvent(
+      net::NetLog::TYPE_DOWNLOAD_STARTED,
+      make_scoped_refptr(new net::NetLogSourceParameter(
+          "source_dependency",
+          bound_net_log_.source())));
 }
 
 // Constructing for the "Save Page As..." feature: