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 445d4dcc3700d7577adaf56454a2722c9ca4f9ea..173706b6a6e529d49124e3e9ecd3c93b7538a524 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,