Declarative resource hints go through mojo IPC to //content

third_party/WebKit/Source/platform/network/NetworkHints.cpp

Index: third_party/WebKit/Source/platform/network/NetworkHints.cpp
diff --git a/third_party/WebKit/Source/platform/network/NetworkHints.cpp b/third_party/WebKit/Source/platform/network/NetworkHints.cpp
index c2c99f7c232bf9945552c288d0cd6cb31acfedc8..088d0c7b46baedb9cd301727afa3f95a08f768a7 100644
--- a/third_party/WebKit/Source/platform/network/NetworkHints.cpp
+++ b/third_party/WebKit/Source/platform/network/NetworkHints.cpp
@@ -26,23 +26,27 @@
 
 #include "platform/network/NetworkHints.h"
 
+#include "platform/PlatformMojoServices.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebPrescientNetworking.h"
 
 namespace blink {
 
-void prefetchDNS(const String& hostname)
+void speculativePrefetchDNS(const String& hostname)
 {
     if (WebPrescientNetworking* prescientNetworking = Platform::current()->prescientNetworking())
         prescientNetworking->prefetchDNS(hostname);
 }
 
+void prefetchDNS(const KURL& url)
+{
+    Platform::current()->mojoServices()->resourceHintsHandler()->Preresolve(url);
+}
+
 void preconnect(const KURL& url, const CrossOriginAttributeValue crossOrigin)
 {
-    if (WebPrescientNetworking* prescientNetworking = Platform::current()->prescientNetworking()) {
-        bool allowCredentials = (crossOrigin != CrossOriginAttributeAnonymous);
-        prescientNetworking->preconnect(url, allowCredentials);
-    }
+    bool allowCredentials = (crossOrigin != CrossOriginAttributeAnonymous);
+    Platform::current()->mojoServices()->resourceHintsHandler()->Preconnect(url, allowCredentials, 1);
 }
 
 } // namespace blink