Add prerender to ChromeOS.

chrome/browser/prerender/prerender_condition.h

+// 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.
+
+#ifndef CHROME_BROWSER_PRERENDER_PRERENDER_CONDITION_H_
+#define CHROME_BROWSER_PRERENDER_PRERENDER_CONDITION_H_
+
+namespace prerender {
+
+// PrerenderCondition's dictate whether prerendering can happen.
+// All conditions must be met before a prerender is allowed.
+class PrerenderCondition {
+ public:
+  virtual ~PrerenderCondition() {}
+  virtual bool CanPrerender() const = 0;
+};
+
+}  // namespace prerender
+
+#endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONDITION_H_