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..c44ad071bd63e24fa9cea466b21e2e3eeabe211e 100644
--- a/chrome/browser/file_select_helper.cc
+++ b/chrome/browser/file_select_helper.cc
@@ -546,7 +546,9 @@ 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_->GetLastCommittedURL(),

[asanka, 2017/01/05 20:35:31]

render_frame_host_ could be nullptr :-(

[Jialiu Lin, 2017/01/05 22:10:13]

Added a check here. in case render_frame_host_ is nullptr

+      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))));