Omnibox - Warm Up PSuggest on Focus

components/omnibox/browser/omnibox_field_trial.cc

 // Copyright 2014 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 "components/omnibox/browser/omnibox_field_trial.h"
 
 #include <cmath>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 19 matching lines @@
 namespace omnibox {
 
 // Feature used to enable the new set of answers in suggest types (currency,
 // dictionary, sports, translation, when is). Note that the state of this
 // Feature is not consulted anywhere in the code. It is only used to force a
 // Finch experiment arm which sends an experiment ID to GWS which triggers
 // serving the new types.
 const base::Feature kNewOmniboxAnswerTypes{"NewOmniboxAnswerTypes",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Feature to enable the search provider to send a request to the suggest
+// server on focus.  This allows the suggest server to warm up, by, for
+// example, loading per-user models into memory.  Having a per-user model
+// in memory allows the suggest server to respond more question with

[Peter Kasting, 2017/03/01 03:00:34]

Nit: more question -> to more questions

[Mark P, 2017/03/01 20:02:32]

Actually, I intended "quickly". Done.

+// personalized suggestions as the user types.
+const base::Feature kSearchProviderWarmUpOnFocus{
+    "OmniboxWarmUpSearchProviderOnFocus", base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace omnibox
 
 namespace {
 
 typedef std::map<std::string, std::string> VariationParams;
 typedef HUPScoringParams::ScoreBuckets ScoreBuckets;
 
 // Field trial names.
 const char kStopTimerFieldTrialName[] = "OmniboxStopTimer";
 
@@ skipping 696 matching lines @@
   if (it != params.end())
     return it->second;
   // Fall back to the global instant extended context.
   it = params.find(rule + ":" + page_classification_str + ":*");
   if (it != params.end())
     return it->second;
   // Look up rule in the global context.
   it = params.find(rule + ":*:*");
   return (it != params.end()) ? it->second : std::string();
 }