Implement PrerenderManager::AddPrerenderForOffline()

chrome/browser/prerender/prerender_constants.h

Index: chrome/browser/prerender/prerender_constants.h
diff --git a/chrome/browser/prerender/prerender_constants.h b/chrome/browser/prerender/prerender_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..5508a9e1b4e70cb097d61e6fddcccc01d6a2ce9c
--- /dev/null
+++ b/chrome/browser/prerender/prerender_constants.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2016 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_CONSTANTS_H_
+#define CHROME_BROWSER_PRERENDER_PRERENDER_CONSTANTS_H_
+
+namespace prerender {
+
+/* Most of the prerender are used in less than 5 minutes. */

[pasko, 2016/04/04 17:04:22]

C++ style comments necessary here.

[gabadie, 2016/04/04 19:42:50]

Done.

+const int kDefaultPrerenderLifeExpectancyMinutes = 5;
+
+/* Offline originated prerenders have an higher life expectancy to have more

[pasko, 2016/04/04 17:04:22]

And here too - C++ style comments.

[gabadie, 2016/04/04 19:42:50]

Done.

+ * time to fully load web pages from slow network before the web content
+ * snapshot. */
+const int kOfflinePrerenderLifeExpectancyMinutes = 20;
+
+}  // namespace prerender
+
+#endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONSTANTS_H_