Do not add history entries for chrome-search:// urls.

chrome/browser/history/history_service.cc

 // 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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 970 matching lines @@
   if (!url.is_valid())
     return false;
 
   // TODO: We should allow kChromeUIScheme URLs if they have been explicitly
   // typed.  Right now, however, these are marked as typed even when triggered
   // by a shortcut or menu action.
   if (url.SchemeIs(content::kJavaScriptScheme) ||
       url.SchemeIs(chrome::kChromeDevToolsScheme) ||
       url.SchemeIs(chrome::kChromeNativeScheme) ||
       url.SchemeIs(chrome::kChromeUIScheme) ||
+      url.SchemeIs(chrome::kChromeSearchScheme) ||
       url.SchemeIs(content::kViewSourceScheme) ||
       url.SchemeIs(chrome::kChromeInternalScheme))
     return false;
 
   // Allow all about: and chrome: URLs except about:blank, since the user may
   // like to see "chrome://memory/", etc. in their history and autocomplete.
   if (url == GURL(content::kAboutBlankURL))
     return false;
 
   return true;
@@ skipping 229 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   visit_database_observers_.RemoveObserver(observer);
 }
 
 void HistoryService::NotifyVisitDBObserversOnAddVisit(
     const history::BriefVisitInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
   FOR_EACH_OBSERVER(history::VisitDatabaseObserver, visit_database_observers_,
                     OnAddVisit(info));
 }