Wireup SafeBrowsingNavigationObserverManager to help PPAPI download attribution

chrome/browser/file_select_helper.cc

Index: chrome/browser/file_select_helper.cc
diff --git a/chrome/browser/file_select_helper.cc b/chrome/browser/file_select_helper.cc
index 1e3e01e3fa3a4b22ae145d308c6917afd98a1b49..8dc8132a2affed270c7fe7ddf0eb5bd599d33f75 100644
--- a/chrome/browser/file_select_helper.cc
+++ b/chrome/browser/file_select_helper.cc
@@ -546,7 +546,10 @@ void FileSelectHelper::CheckDownloadRequestWithSafeBrowsing(
 
   GURL requestor_url = params->requestor;
   sb_service->download_protection_service()->CheckPPAPIDownloadRequest(
-      requestor_url, default_file_path, alternate_extensions, profile_,
+      requestor_url,
+      render_frame_host_? render_frame_host_->GetLastCommittedURL() : GURL(),
+      WebContents::FromRenderFrameHost(render_frame_host_),
+      default_file_path, alternate_extensions, profile_,
       base::Bind(&InterpretSafeBrowsingVerdict,
                  base::Bind(&FileSelectHelper::ProceedWithSafeBrowsingVerdict,
                             this, default_file_path, base::Passed(&params))));