Handle <link rel=prerender> in chrome.

chrome/browser/prerender/prerender_field_trial.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/prerender/prerender_field_trial.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
@@ skipping 74 matching lines @@
       const int trial_group = trial->group();
       if (trial_group == kYesPrefetchGroup) {
         ResourceDispatcherHost::set_is_prefetch_enabled(true);
         PrerenderManager::SetMode(PrerenderManager::PRERENDER_MODE_DISABLED);
       } else if (trial_group == kNoPrefetchGroup) {
         ResourceDispatcherHost::set_is_prefetch_enabled(false);
         PrerenderManager::SetMode(
             PrerenderManager::PRERENDER_MODE_DISABLED);
       } else if (trial_group == kPrerenderExperiment1Group ||
                  trial_group == kPrerenderExperiment2Group) {
-        ResourceDispatcherHost::set_is_prefetch_enabled(true);
+        ResourceDispatcherHost::set_is_prefetch_enabled(false);
         PrerenderManager::SetMode(
             PrerenderManager::PRERENDER_MODE_EXPERIMENT_PRERENDER_GROUP);
       } else if (trial_group == kPrerenderControl1Group ||
                  trial_group == kPrerenderControl2Group) {
-        ResourceDispatcherHost::set_is_prefetch_enabled(true);
+        ResourceDispatcherHost::set_is_prefetch_enabled(false);
         PrerenderManager::SetMode(
             PrerenderManager::PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP);
       } else {
         NOTREACHED();
       }
       break;
     }
     case PRERENDER_OPTION_DISABLED:
       ResourceDispatcherHost::set_is_prefetch_enabled(false);
       PrerenderManager::SetMode(PrerenderManager::PRERENDER_MODE_DISABLED);
       break;
     case PRERENDER_OPTION_ENABLED:
-      ResourceDispatcherHost::set_is_prefetch_enabled(true);
+      ResourceDispatcherHost::set_is_prefetch_enabled(false);
       PrerenderManager::SetMode(PrerenderManager::PRERENDER_MODE_ENABLED);
       break;
     case PRERENDER_OPTION_PREFETCH_ONLY:
       ResourceDispatcherHost::set_is_prefetch_enabled(true);
       PrerenderManager::SetMode(PrerenderManager::PRERENDER_MODE_DISABLED);
       break;
     default:
       NOTREACHED();
   }
 
   UMA_HISTOGRAM_ENUMERATION("Prerender.Sessions",
                             PrerenderManager::GetMode(),
                             PrerenderManager::PRERENDER_MODE_MAX);
 }
 
 }  // namespace prerender