<webview>: Make contentWindow available prior to attachment (on display:none).

extensions/browser/guest_view/web_view/web_view_guest.cc

Index: extensions/browser/guest_view/web_view/web_view_guest.cc
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.cc b/extensions/browser/guest_view/web_view/web_view_guest.cc
index 8b9bfb0391399deca42ff8a2b7724d372417e117..76712fa7325c1d1a5c274e2801e65ae5abc09943 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.cc
+++ b/extensions/browser/guest_view/web_view/web_view_guest.cc
@@ -983,7 +983,6 @@ void WebViewGuest::ApplyAttributes(const base::DictionaryValue& params) {
     params.GetString(webview::kAttributeSrc, &src);
     NavigateGuest(src, false /* force_navigation */);
   }
-
 }
 
 void WebViewGuest::ShowContextMenu(
@@ -1077,7 +1076,7 @@ bool WebViewGuest::LoadDataWithBaseURL(const std::string& data_url,
       content::NavigationController::UA_OVERRIDE_INHERIT;
 
   // Navigate to the data URL.
-  web_contents()->GetController().LoadURLWithParams(load_params);
+  GuestViewBase::LoadURLWithParams(load_params);
 
   return true;
 }
@@ -1205,7 +1204,7 @@ void WebViewGuest::LoadURLWithParams(const GURL& url,
     load_url_params.override_user_agent =
         content::NavigationController::UA_OVERRIDE_TRUE;
   }
-  web_contents()->GetController().LoadURLWithParams(load_url_params);
+  GuestViewBase::LoadURLWithParams(load_url_params);
 
   src_ = validated_url;
 }