Rename spellchecker preprocessor flag

chrome/chrome_renderer.gypi

 # 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.
 
 {
   'variables': {
     'chrome_renderer_sources': [
       'renderer/banners/app_banner_client.cc',
       'renderer/banners/app_banner_client.h',
       'renderer/benchmarking_extension.cc',
@@ skipping 334 matching lines @@
             '<@(chrome_renderer_spellchecker_sources)',
           ],
           'conditions': [
             ['OS!="android"', {
               'dependencies': [
                 '../third_party/hunspell/hunspell.gyp:hunspell',
               ],
             }],
           ],
         }],
-        ['use_platform_spellchecker==0', {
+        ['use_browser_spellchecker==0', {
           'sources!': [
             'renderer/spellchecker/platform_spelling_engine.cc',
             'renderer/spellchecker/platform_spelling_engine.h',
           ]
         }],
         ['OS=="android"', {
           'sources!': [
             'renderer/spellchecker/hunspell_engine.cc',
             'renderer/spellchecker/hunspell_engine.h',
           ]
@@ skipping 37 matching lines @@
               'export_dependent_settings': [
                 '<(allocator_target)',
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }