Add prerender to ChromeOS.

chrome/browser/prerender/prerender_condition.h

Index: chrome/browser/prerender/prerender_condition.h
diff --git a/chrome/browser/prerender/prerender_condition.h b/chrome/browser/prerender/prerender_condition.h
new file mode 100644
index 0000000000000000000000000000000000000000..ee2541489976110d436ffc6e00c16f0d12a0c6ce
--- /dev/null
+++ b/chrome/browser/prerender/prerender_condition.h
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+// 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_