Add prerender to ChromeOS.

chrome/browser/prerender/prerender_field_trial.cc

Index: chrome/browser/prerender/prerender_field_trial.cc
diff --git a/chrome/browser/prerender/prerender_field_trial.cc b/chrome/browser/prerender/prerender_field_trial.cc
index 1066ce0f42dda7d9c799fdf7bc5a4a9585507502..1909357c2d1afdeae8e4ba8eeb4afd8f9a8ab67b 100644
--- a/chrome/browser/prerender/prerender_field_trial.cc
+++ b/chrome/browser/prerender/prerender_field_trial.cc
@@ -47,13 +47,6 @@ void ConfigurePrefetchAndPrerender(const CommandLine& command_line) {
     }
   }
 
-#if defined(OS_CHROMEOS)
-  // Prerender is not enabled on CrOS by default..
-  // http://crosbug.com/12483
-  if (prerender_option == PRERENDER_OPTION_AUTO)
-    prerender_option = PRERENDER_OPTION_DISABLED;
-#endif
-
   switch (prerender_option) {
     case PRERENDER_OPTION_AUTO: {
       const base::FieldTrial::Probability kPrefetchDivisor = 1000;