Place source URL of DownloadFile in extended attributes

content/browser/download/base_file.cc

Index: content/browser/download/base_file.cc
===================================================================
--- content/browser/download/base_file.cc	(revision 146539)
+++ content/browser/download/base_file.cc	(working copy)
@@ -27,6 +27,8 @@
 #include "content/browser/safe_util_win.h"
 #elif defined(OS_MACOSX)
 #include "content/browser/file_metadata_mac.h"
+#elif defined(OS_LINUX)
+#include "content/browser/file_metadata_linux.h"
 #endif
 
 using content::BrowserThread;
@@ -470,6 +472,9 @@
                                              referrer_url_);
   file_metadata::AddOriginMetadataToFile(full_path_, source_url_,
                                          referrer_url_);
+#elif defined(OS_LINUX)
+  file_metadata::AddOriginMetadataToFile(full_path_, source_url_,
+                                         referrer_url_);
 #endif
 }
 
@@ -555,3 +560,4 @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   return CurrentSpeedAtTime(base::TimeTicks::Now());
 }
+