Make safe browsing work in a multi-profile environment.

chrome/browser/download/download_safe_browsing_client.h

Index: chrome/browser/download/download_safe_browsing_client.h
===================================================================
--- chrome/browser/download/download_safe_browsing_client.h	(revision 89656)
+++ chrome/browser/download/download_safe_browsing_client.h	(working copy)
@@ -35,7 +35,8 @@
 
   DownloadSBClient(int32 download_id,
                    const std::vector<GURL>& url_chain,
-                   const GURL& referrer_url);
+                   const GURL& referrer_url,
+                   bool safe_browsing_enabled);
 
   // Call safebrowsing service to verifiy the download.
   // For each DownloadSBClient instance, either CheckDownloadUrl or
@@ -110,6 +111,8 @@
   // When a safebrowsing check starts, for stats purpose.
   base::TimeTicks start_time_;
 
+  bool safe_browsing_enabled_;
+
   DISALLOW_COPY_AND_ASSIGN(DownloadSBClient);
 };