Added chrome-side support for link rel=preconnect

components/network_hints/renderer/prescient_networking_dispatcher.h

Index: components/network_hints/renderer/prescient_networking_dispatcher.h
diff --git a/components/network_hints/renderer/prescient_networking_dispatcher.h b/components/network_hints/renderer/prescient_networking_dispatcher.h
index 9b107390df79edf1febe4ebbfea8974439d34266..3b2219e48d5a58f4234cd005579329bb2369f353 100644
--- a/components/network_hints/renderer/prescient_networking_dispatcher.h
+++ b/components/network_hints/renderer/prescient_networking_dispatcher.h
@@ -7,6 +7,7 @@
 
 #include "base/macros.h"
 #include "components/network_hints/renderer/renderer_dns_prefetch.h"
+#include "components/network_hints/renderer/renderer_preconnect.h"
 #include "third_party/WebKit/public/platform/WebPrescientNetworking.h"
 
 namespace network_hints {
@@ -19,9 +20,11 @@ class PrescientNetworkingDispatcher : public blink::WebPrescientNetworking {
   ~PrescientNetworkingDispatcher() override;
 
   void prefetchDNS(const blink::WebString& hostname) override;
+  void preconnect(const blink::WebURL& url) override;
 
  private:
   network_hints::RendererDnsPrefetch dns_prefetch_;
+  network_hints::RendererPreconnect preconnect_;
 
   DISALLOW_COPY_AND_ASSIGN(PrescientNetworkingDispatcher);
 };