Remove ENABLE_LANGUAGE_DETECTION

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2821 matching lines @@
           ],
           'sources/': [
             ['exclude', '^browser/themes/'],
           ],
         }],
         ['enable_automation!=1', {
           'sources/': [
             ['exclude', '^browser/automation/'],
           ],
         }],
-        ['enable_language_detection==0', {
-          'sources!': [
-            'browser/language_usage_metrics.cc',
-            'browser/language_usage_metrics.h',
-          ],
-        }],
         ['enable_printing!=1', {
           'sources/': [
             ['exclude', '^browser/printing/'],
           ],
         }],
         ['enable_captive_portal_detection!=1', {
           'sources/': [
             ['exclude', '^browser/captive_portal/'],
           ],
         }],
@@ skipping 489 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }