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;
+  }
+}

[Eric Shienbrood, 2011/07/27 22:06:33]

I think you're right to keep things simple for now. But we'll probably want to
support prerendering for mobile data connections at some point, based on the
access technology in use (e.g., HSPA+ or LTE).

[cbentzel, 2011/07/28 13:00:32]

The concern is more about usage caps at this point than performance. 

+
+}  // namespace chromeos