[AiS] Enable AiS flag on all platforms

chrome/browser/autocomplete/search_provider.cc

 // Copyright 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/autocomplete/search_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/base64.h"
@@ skipping 623 matching lines @@
     int id,
     const TemplateURL* template_url,
     const AutocompleteInput& input) {
   if (!template_url || template_url->suggestions_url().empty())
     return NULL;
 
   // Bail if the suggestion URL is invalid with the given replacements.
   TemplateURLRef::SearchTermsArgs search_term_args(input.text());
   search_term_args.cursor_position = input.cursor_position();
   search_term_args.page_classification = input.current_page_classification();
-#if defined(OS_ANDROID)
   if (CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableAnswersInSuggest))
+          switches::kEnableAnswersInSuggest))
     search_term_args.session_token = GetSessionToken();
-#endif
   GURL suggest_url(template_url->suggestions_url_ref().ReplaceSearchTerms(
       search_term_args));
   if (!suggest_url.is_valid())
     return NULL;
   // Send the current page URL if user setting and URL requirements are met and
   // the user is in the field trial.
   if (CanSendURL(current_page_url_, suggest_url, template_url,
                  input.current_page_classification(), profile_) &&
       OmniboxFieldTrial::InZeroSuggestAfterTypingFieldTrial()) {
     search_term_args.current_page_url = current_page_url_.spec();
@@ skipping 490 matching lines @@
     std::string raw_data;
     base::RandBytes(WriteInto(&raw_data, kTokenBytes + 1), kTokenBytes);
     base::Base64Encode(raw_data, &current_token_);
   }
 
   // Extend expiration time another 60 seconds.
   token_expiration_time_ = current_time + base::TimeDelta::FromSeconds(60);
 
   return current_token_;
 }