Disable retrieving suggestions in the background.

chrome/renderer/spellchecker/spellcheck.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/renderer/spellchecker/spellcheck.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/message_loop_proxy.h"
@@ skipping 218 matching lines @@
   size_t offset = 0;
 
   // Spellcheck::SpellCheckWord() automatically breaks text into words and
   // checks the spellings of the extracted words. This function sets the
   // position and length of the first misspelled word and returns false when
   // the text includes misspelled words. Therefore, we just repeat calling the
   // function until it returns true to check the whole text.
   int misspelling_start = 0;
   int misspelling_length = 0;
   while (offset <= length) {
-    std::vector<string16> suggestions;
     if (SpellCheckWord(&text[offset],
                        length - offset,
                        0,
                        &misspelling_start,
                        &misspelling_length,
-                       &suggestions)) {
+                       NULL)) {
       return true;
     }
 
     string16 replacement;
-    if (!suggestions.empty())
-      replacement = JoinString(suggestions, '\n');
     results->push_back(SpellCheckResult(
         SpellCheckResult::SPELLING,
         misspelling_start + offset,
         misspelling_length,
         replacement));
     offset += misspelling_start + misspelling_length;
   }
 
   return false;
 #else
@@ skipping 241 matching lines @@
 
   string16 word;
   int word_start;
   int word_length;
   while (contraction_iterator_.GetNextWord(&word, &word_start, &word_length)) {
     if (!CheckSpelling(word, tag))
       return false;
   }
   return true;
 }