Move BrowserThread to content namespace.

chrome/browser/spellchecker/spellchecker_mac.mm

 // Copyright (c) 2011 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.
 
 // This file implements the interface defined in spellchecker_platform_engine.h
 // for the OS X platform.
 
 #include "chrome/browser/spellchecker/spellchecker_platform_engine.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/sys_string_conversions.h"
 #include "base/task.h"
 #include "base/time.h"
 #include "chrome/common/spellcheck_common.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "content/browser/browser_message_filter.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebTextCheckingResult.h"
 
 using base::TimeTicks;
+using content::BrowserThread;
+
 namespace {
 // The number of characters in the first part of the language code.
 const unsigned int kShortLanguageCodeSize = 2;
 
 // TextCheckingTask is reserved for spell checking against large size
 // of text, which possible contains multiple paragrpahs.  Checking
 // that size of text might take time, and should be done as a task on
 // the FILE thread.
 //
 // The result of the check is returned back as a
@@ skipping 255 matching lines @@
                       int identifier,
                       int document_tag,
                       const string16& text, BrowserMessageFilter* destination) {
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       new TextCheckingTask(
           destination, route_id, identifier, text, document_tag));
 }
 
 }  // namespace SpellCheckerPlatform