Add HTMLResourcePreloader preconnect unit tests

Source/core/html/parser/ResourcePreloader.cpp

Index: Source/core/html/parser/ResourcePreloader.cpp
diff --git a/Source/core/html/parser/ResourcePreloader.cpp b/Source/core/html/parser/ResourcePreloader.cpp
index 2598da0f0301698e234cf042fa1b5d354cc7c1fe..16c53d60fe5730b6d37e46d04784ce143e8a3dde 100644
--- a/Source/core/html/parser/ResourcePreloader.cpp
+++ b/Source/core/html/parser/ResourcePreloader.cpp
@@ -4,16 +4,18 @@
 
 #include "config.h"
 #include "core/html/parser/ResourcePreloader.h"
+#include "core/loader/NetworkHintsInterface.h"
 
 namespace blink {
 
 void ResourcePreloader::takeAndPreload(PreloadRequestStream& r)
 {
     PreloadRequestStream requests;
+    NetworkHintsInterfaceImpl networkHintsInterface;
     requests.swap(r);
 
     for (PreloadRequestStream::iterator it = requests.begin(); it != requests.end(); ++it)
-        preload(it->release());
+        preload(it->release(), networkHintsInterface);
 }
 
 }