PlzNavigate: Do not send synchronous navigations from the renderer to the browser.

content/browser/frame_host/navigation_request.h

Index: content/browser/frame_host/navigation_request.h
diff --git a/content/browser/frame_host/navigation_request.h b/content/browser/frame_host/navigation_request.h
index b92906cafb1729a04324237459a1285a92d2d067..133f6986e150a9918ea14fb839421aee3750a729 100644
--- a/content/browser/frame_host/navigation_request.h
+++ b/content/browser/frame_host/navigation_request.h
@@ -54,11 +54,6 @@ class CONTENT_EXPORT NavigationRequest : public NavigationURLLoaderDelegate {
     FAILED,
   };
 
-  // Helper function to determine if the navigation request to |url| should be
-  // sent to the network stack. It will not be sent for data URLs or JavaScript
-  // URLs, cases where no network request needs to be made.
-  static bool ShouldMakeNetworkRequest(const GURL& url);
-
   // Creates a request for a browser-intiated navigation.
   static scoped_ptr<NavigationRequest> CreateBrowserInitiated(
       FrameTreeNode* frame_tree_node,