Provide a way to specify in Finch trials to disable prerender local

chrome/browser/prerender/prerender_local_predictor.cc

 // Copyright (c) 2012 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_local_predictor.h"
 
 #include <ctype.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 598 matching lines @@
         "Prerender.LocalPredictorTimeUntilUsed",
         GetCurrentTime() - current_prerender_->actual_start_time,
         base::TimeDelta::FromMilliseconds(10),
         base::TimeDelta::FromMilliseconds(GetMaxLocalPredictionTimeMs()),
         50);
     last_swapped_in_prerender_.reset(current_prerender_.release());
     RecordEvent(EVENT_ADD_VISIT_PRERENDER_IDENTIFIED);
   }
   if (ShouldExcludeTransitionForPrediction(info.transition))
     return;
+  Profile* profile = prerender_manager_->profile();
+  if (!profile || DisableLocalPredictorBasedOnSyncAndConfiguration(profile))

[jkarlin, 2014/09/23 14:54:03]

I expected to see something call your new TemporarilyDisable... function?

[tburkard, 2014/09/24 15:15:34]

Done.

+    return;
   RecordEvent(EVENT_ADD_VISIT_RELEVANT_TRANSITION);
   base::TimeDelta max_age =
       base::TimeDelta::FromMilliseconds(GetMaxLocalPredictionTimeMs());
   base::TimeDelta min_age =
       base::TimeDelta::FromMilliseconds(kMinLocalPredictionTimeMs);
   std::set<URLID> next_urls_currently_found;
   std::map<URLID, int> next_urls_num_found;
   int num_occurrences_of_current_visit = 0;
   base::Time last_visited;
   scoped_ptr<CandidatePrerenderInfo> lookup_info(
@@ skipping 937 matching lines @@
       break;
     case content::SessionStorageNamespace::MERGE_RESULT_MERGEABLE:
       RecordEvent(EVENT_NAMESPACE_MISMATCH_MERGE_RESULT_MERGEABLE);
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace prerender