Invert description and URL for experimental zero suggest suggestions.

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 521 matching lines @@
   // This is a best-effort conversion; we trust the hand-crafted parameters
   // downloaded from the server to be perfect.  There's no need for handle
   // errors smartly.
   int value;
   base::StringToInt(value_str, &value);
   return value;
 }
 
 OmniboxFieldTrial::EmphasizeTitlesCondition
 OmniboxFieldTrial::GetEmphasizeTitlesConditionForInput(
-    metrics::OmniboxInputType::Type input_type) {
-  // Look up the parameter named kEmphasizeTitlesRule + ":" + input_type,
+    const AutocompleteInput& input) {
+  // First, check if we should emphasize titles for zero suggest suggestions.
+  if (input.from_omnibox_focus() &&
+      base::FeatureList::IsEnabled(features::kZeroSuggestSwapTitleAndUrl)) {
+    return EMPHASIZE_WHEN_NONEMPTY;
+  }
+  // Look up the parameter named kEmphasizeTitlesRule + ":" + input.type(),
   // find its value, and return that value as an enum.  If the parameter
   // isn't redefined, fall back to the generic rule kEmphasizeTitlesRule + ":*"
   std::string value_str(variations::GetVariationParamValue(
       kBundledExperimentFieldTrialName,
       std::string(kEmphasizeTitlesRule) + "_" +
-      base::IntToString(static_cast<int>(input_type))));
+          base::IntToString(static_cast<int>(input.type()))));
   if (value_str.empty()) {
     value_str = variations::GetVariationParamValue(
         kBundledExperimentFieldTrialName,
         std::string(kEmphasizeTitlesRule) + "_*");
   }
   if (value_str.empty())
     return EMPHASIZE_NEVER;
   // This is a best-effort conversion; we trust the hand-crafted parameters
   // downloaded from the server to be perfect.  There's no need for handle
   // errors smartly.
@@ skipping 202 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();
 }