Add search_terms_replacement_key field to TemplateURL.

chrome/browser/search_engines/template_url.h

Index: chrome/browser/search_engines/template_url.h
diff --git a/chrome/browser/search_engines/template_url.h b/chrome/browser/search_engines/template_url.h
index 2e89118da58dcdcbfc665d434b90ebc73160e3b8..43c065bb95c9bab3b9ddb2a19b15149553892feb 100644
--- a/chrome/browser/search_engines/template_url.h
+++ b/chrome/browser/search_engines/template_url.h
@@ -159,6 +159,7 @@ class TemplateURLRef {
     GOOGLE_BASE_SUGGEST_URL,
     GOOGLE_INSTANT_ENABLED,
     GOOGLE_INSTANT_EXTENDED_ENABLED,
+    GOOGLE_INSTANT_EXTENDED_ENABLED_KEY,
     GOOGLE_ORIGINAL_QUERY_FOR_SUGGESTION,
     GOOGLE_RLZ,
     GOOGLE_SEARCH_CLIENT,
@@ -347,6 +348,13 @@ struct TemplateURLData {
   // search terms from a URL.
   std::vector<std::string> alternate_urls;
 
+
+  // A parameter that, if present and non-zero in a search_url or instant_url,
+  // causes Chrome to replace the URL with the search term.
+  // The parameter must be in the query if the search terms are in the query,
+  // and in the ref if the search terms are in the ref.
+  std::string search_terms_replacement_key;
+
  private:
   // Private so we can enforce using the setters and thus enforce that these
   // fields are never empty.
@@ -398,6 +406,10 @@ class TemplateURL {
 
   const GURL& originating_url() const { return data_.originating_url; }
 
+  const std::string& search_terms_replacement_key() const {
+    return data_.search_terms_replacement_key;
+  }
+
   bool show_in_default_list() const { return data_.show_in_default_list; }
   // Returns true if show_in_default_list() is true and this TemplateURL has a
   // TemplateURLRef that supports replacement.