Fix ChromeRenderViewObserver::DidStopLoading to be OOPIF compatible.

chrome/renderer/chrome_render_view_observer.cc

Index: chrome/renderer/chrome_render_view_observer.cc
diff --git a/chrome/renderer/chrome_render_view_observer.cc b/chrome/renderer/chrome_render_view_observer.cc
index a2e1b9aecc961cc413ebc94187a186cdd02103b8..541115dcd84b12a07fb20815a876f4a5fa003077 100644
--- a/chrome/renderer/chrome_render_view_observer.cc
+++ b/chrome/renderer/chrome_render_view_observer.cc
@@ -334,6 +334,11 @@ void ChromeRenderViewObserver::DidStartLoading() {
 
 void ChromeRenderViewObserver::DidStopLoading() {
   WebFrame* main_frame = render_view()->GetWebView()->mainFrame();
+
+  // Remote frames don't host a document, so return early if that's the case.
+  if (main_frame->isWebRemoteFrame())
+    return;
+
   GURL osdd_url = main_frame->document().openSearchDescriptionURL();
   if (!osdd_url.is_empty()) {
     Send(new ChromeViewHostMsg_PageHasOSDD(