Add #include <iterator> to files that use std::back_inserter.

chrome/browser/autocomplete/autocomplete.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.
 
 #include "chrome/browser/autocomplete/autocomplete.h"
 
 #include <algorithm>
+#include <iterator>
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/i18n/number_formatting.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_controller_delegate.h"
@@ skipping 1106 matching lines @@
     const AutocompleteResult& result)
     : text(text),
       input_type(input_type),
       selected_index(selected_index),
       tab_id(tab_id),
       elapsed_time_since_user_first_modified_omnibox(
           elapsed_time_since_user_first_modified_omnibox),
       inline_autocompleted_length(inline_autocompleted_length),
       result(result) {
 }