[AiS] Provide Answers queries with a session token.

chrome/browser/search_engines/template_url.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_
 
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 87 matching lines @@
     // The URL of the current webpage to be used for experimental zero-prefix
     // suggestions.
     std::string current_page_url;
 
     // Which omnibox the user used to type the prefix.
     AutocompleteInput::PageClassification page_classification;
 
     // True for searches issued with the bookmark bar pref set to shown.
     bool bookmark_bar_pinned;
 
+    // Optional session token.
+    std::string session_token;
+
     // Additional query params provided by the suggest server.
     std::string suggest_query_params;
 
     // If set, ReplaceSearchTerms() will automatically append any extra query
     // params specified via the --extra-search-query-params command-line
     // argument.  Generally, this should be set when dealing with the search or
     // instant TemplateURLRefs of the default search engine and the caller cares
     // about the query portion of the URL.  Since neither TemplateURLRef nor
     // indeed TemplateURL know whether a TemplateURL is the default search
     // engine, callers instead must set this manually.
@@ skipping 148 matching lines @@
     GOOGLE_IMAGE_URL,
     GOOGLE_FORCE_INSTANT_RESULTS,
     GOOGLE_INSTANT_EXTENDED_ENABLED,
     GOOGLE_NTP_IS_THEMED,
     GOOGLE_OMNIBOX_START_MARGIN,
     GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION,
     GOOGLE_PAGE_CLASSIFICATION,
     GOOGLE_RLZ,
     GOOGLE_SEARCH_CLIENT,
     GOOGLE_SEARCH_FIELDTRIAL_GROUP,
+    GOOGLE_SESSION_TOKEN,
     GOOGLE_SUGGEST_CLIENT,
     GOOGLE_SUGGEST_REQUEST_ID,
     GOOGLE_UNESCAPED_SEARCH_TERMS,
     LANGUAGE,
     SEARCH_TERMS,
   };
 
   // Used to identify an element of the raw url that can be replaced.
   struct Replacement {
     Replacement(ReplacementType type, size_t index)
@@ skipping 487 matching lines @@
   TemplateURLRef image_url_ref_;
   TemplateURLRef new_tab_url_ref_;
   scoped_ptr<AssociatedExtensionInfo> extension_info_;
 
   // TODO(sky): Add date last parsed OSD file.
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURL);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_H_