Handle <link rel=prerender> in chrome.

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 258a43a0026f6d1d64e8c543ea2e2adb06550a80..eb0f96d54e69e11aace1126f6a6c11ec4e18cd84 100644
--- a/chrome/browser/prerender/prerender_field_trial.cc
+++ b/chrome/browser/prerender/prerender_field_trial.cc
@@ -92,12 +92,12 @@ void ConfigurePrefetchAndPrerender(const CommandLine& command_line) {
             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 {
@@ -110,7 +110,7 @@ void ConfigurePrefetchAndPrerender(const CommandLine& command_line) {
       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: