Add WebPrescientNetworking to trigger preconnect from Blink.

Source/core/platform/network/Preconnect.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 11 matching lines @@
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
-#include "RuntimeEnabledFeatures.h"
+#include "core/platform/network/Preconnect.h"
 
-#include "core/platform/graphics/MediaPlayer.h"
-#include "core/workers/SharedWorkerRepository.h"
+#include <public/Platform.h>
+#include <public/WebURL.h>
+#include <public/WebPrerenderingSupport.h>
 
 namespace WebCore {
 
-bool RuntimeEnabledFeatures::mediaEnabled()
+void preconnect(const KURL& url, PreconnectMotivation motivation)
 {
-    return MediaPlayer::isAvailable();
+    WebKit::WebPrerenderingSupport* platform = WebKit::WebPrerenderingSupport::current();
+    if (!platform)
+        return;
+    platform->preconnect(WebKit::WebURL(url), static_cast<WebKit::WebPreconnectMotivation>(motivation));
 }
 
-bool RuntimeEnabledFeatures::sharedWorkerEnabled()
-{
-    return SharedWorkerRepository::isAvailable();
 }
-
-} // namespace WebCore