Add prerender to ChromeOS.

chrome/browser/chromeos/prerender_condition_network.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chromeos/prerender_condition_network.h"
+
+namespace chromeos {
+
+PrerenderConditionNetwork::PrerenderConditionNetwork(
+    NetworkLibrary* network_library) : network_library_(network_library) {
+  DCHECK(network_library_);
+}
+
+PrerenderConditionNetwork::~PrerenderConditionNetwork() {
+}
+
+bool PrerenderConditionNetwork::CanPrerender() const {
+  const Network* active_network = network_library_->active_network();
+  if (!active_network)
+    return false;
+  switch (active_network->type()) {
+    case TYPE_ETHERNET:
+    case TYPE_WIFI:
+      return true;
+    default:
+      return false;
+  }
+}
+
+}  // namespace chromeos