Prevent querying of restricted query values.

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index 188272968fb55f1bfa87625474479ac5c5cce858..af5042fb464cbe958aae6d0ed0537fcb0716e387 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -28,8 +28,15 @@ class SearchBox : public content::RenderViewObserver,
   virtual ~SearchBox();
 
   // Sends ChromeViewHostMsg_SetSuggestions to the browser.
+  // If |suggestions| is non-empty and the first element in |suggestions| is of
+  // type INSTANT_COMPLETE_REPLACE then this method will also update the current
+  // query text.
   void SetSuggestions(const std::vector<InstantSuggestion>& suggestions);
 
+  // Clears the current query text, used to ensure that restricted query strings
+  // are not retained.
+  void ClearQuery();
+
   // Sends ChromeViewHostMsg_ShowInstantOverlay to the browser.
   void ShowInstantOverlay(InstantShownReason reason,
                           int height,
@@ -135,6 +142,13 @@ class SearchBox : public content::RenderViewObserver,
   size_t omnibox_font_size_;
   std::vector<InstantMostVisitedItem> most_visited_items_;
 
+  // URL to Restricted Id mapping.
+  // TODO(dcblack): Unify this logic to work with both Most Visited and
+  // history suggestions.  (crbug/175768)
+  std::map<string16, int> url_to_restricted_id_map_;
+  std::map<int, string16> restricted_id_to_url_map_;
+  int last_restricted_id_;
+
   DISALLOW_COPY_AND_ASSIGN(SearchBox);
 };