[Icons NTP] Add window.configData.useIcons.

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"
@@ skipping 61 matching lines @@
     return false;
 
   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);
+}
+
 // 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.
 void SendResource(int resource_id,
                   const content::URLDataSource::GotDataCallback& callback) {
@@ skipping 41 matching lines @@
 }
 
 // Returns a JS dictionary of configuration data for the local NTP.
 std::string GetConfigData(Profile* profile) {
   base::DictionaryValue config_data;
   bool is_google = DefaultSearchProviderIsGoogle(profile) &&
       chrome::ShouldShowGoogleLocalNTP();
   config_data.Set("translatedStrings",
                   GetTranslatedStrings(is_google).release());
   config_data.SetBoolean("isGooglePage", is_google);
+  config_data.SetBoolean("useIcons", IsIconNTPEnabled());
 
   // Serialize the dictionary.
   std::string js_text;
   JSONStringValueSerializer serializer(&js_text);
   serializer.Serialize(config_data);
 
   std::string config_data_js;
   config_data_js.append("var configData = ");
   config_data_js.append(js_text);
   config_data_js.append(";");
@@ skipping 79 matching lines @@
     }
   }
   return false;
 }
 
 std::string LocalNtpSource::GetContentSecurityPolicyFrameSrc() const {
   // Allow embedding of most visited iframes.
   return base::StringPrintf("frame-src %s;",
                             chrome::kChromeSearchMostVisitedUrl);
 }