Cleanup: Remove more unneeded browser_thread.h includes.

chrome/browser/spellchecker/spelling_service_client.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/spellchecker/spelling_service_client.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/string_escape.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/spellcheck_result.h"
-#include "content/public/browser/browser_thread.h"
 #include "google_apis/google_api_keys.h"
 #include "net/base/load_flags.h"
 #include "net/url_request/url_fetcher.h"
 #include "unicode/uloc.h"
 
 // Use the public URL to the Spelling service on Chromium.
 #ifndef SPELLING_SERVICE_URL
 #define SPELLING_SERVICE_URL "https://www.googleapis.com/rpc"
 #endif
 
@@ skipping 192 matching lines @@
     if (!suggestions->GetDictionary(0, &suggestion) ||
         !suggestion->GetString("suggestion", &replacement)) {
       return false;
     }
     SpellCheckResult result(
         SpellCheckResult::SPELLING, start, length, replacement);
     results->push_back(result);
   }
   return true;
 }