[Icons NTP] Use GetVariationParamValue instead of experiment prefix to determine when large icons a…

chrome/browser/search/local_ntp_source.cc

 // Copyright 2013 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/search/local_ntp_source.h"
 
 #include "base/json/json_string_value_serializer.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/search/instant_io_context.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/search_engines/template_url_prepopulate_data.h"
 #include "components/search_engines/template_url_service.h"
+#include "components/variations/variations_associated_data.h"
 #include "grit/browser_resources.h"
 #include "grit/theme_resources.h"
 #include "net/url_request/url_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
 #include "ui/base/webui/web_ui_util.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "url/gurl.h"
 
@@ skipping 41 matching lines @@
   const TemplateURL* default_provider =
       template_url_service->GetDefaultSearchProvider();
   return default_provider &&
       (TemplateURLPrepopulateData::GetEngineType(
           *default_provider, template_url_service->search_terms_data()) ==
        SEARCH_ENGINE_GOOGLE);
 }
 
 // Returns whether icon NTP is enabled.
 bool IsIconNTPEnabled() {
-  return StartsWithASCII(base::FieldTrialList::FindFullName("IconNTP"),
-                         "Enabled", true);
+  return variations::GetVariationParamValue("IconNTP", "state") == "enabled";
 }
 
 // Returns whether we are in the Fast NTP experiment or not.
 bool IsLocalNTPFastEnabled() {
   return StartsWithASCII(base::FieldTrialList::FindFullName("LocalNTPFast"),
                          "Enabled", true);
 }
 
 // Serves a particular resource.
 // Used for bypassing the default resources when we are in an experiment.
@@ skipping 143 matching lines @@
     }
   }
   return false;
 }
 
 std::string LocalNtpSource::GetContentSecurityPolicyFrameSrc() const {
   // Allow embedding of most visited iframes.
   return base::StringPrintf("frame-src %s;",
                             chrome::kChromeSearchMostVisitedUrl);
 }