Make browser_handles_top_level_requests synchronous.

content/public/browser/web_contents_delegate.cc

Index: content/public/browser/web_contents_delegate.cc
diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index f4c0bc970380e7bfbe1da845d6eaca8930494df5..b75df29f83055463f2d912d42289d6b80c8d3340 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -24,6 +24,16 @@ WebContents* WebContentsDelegate::OpenURLFromTab(WebContents* source,
   return NULL;
 }
 
+bool WebContentsDelegate::ShouldIgnoreNavigation(
+      WebContents* source,
+      const GURL& url,
+      const content::Referrer& referrer,
+      WindowOpenDisposition disposition,
+      bool is_content_initiated,
+      content::PageTransition transition_type) {
+  return false;
+}
+
 bool WebContentsDelegate::IsPopupOrPanel(const WebContents* source) const {
   return false;
 }