Make DETECT_IMPORTANT_CONTENT the default Plugins content setting based

components/content_settings.gypi

 # Copyright 2014 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': [
     {
       # GN version: //components/content_settings/core/browser
       'target_name': 'content_settings_core_browser',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_prefs',
         '../net/net.gyp:net',
         '../url/url.gyp:url_lib',
         'content_settings_core_common',
+        'plugins_common',
         'pref_registry',
       ],
       'variables': { 'enable_wexit_time_destructors': 1, },
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'content_settings/core/browser/content_settings_binary_value_map.cc',
         'content_settings/core/browser/content_settings_binary_value_map.h',
@@ skipping 18 matching lines @@
         'content_settings/core/browser/content_settings_provider.h',
         'content_settings/core/browser/content_settings_rule.cc',
         'content_settings/core/browser/content_settings_rule.h',
         'content_settings/core/browser/content_settings_usages_state.cc',
         'content_settings/core/browser/content_settings_usages_state.h',
         'content_settings/core/browser/content_settings_utils.cc',
         'content_settings/core/browser/content_settings_utils.h',
         'content_settings/core/browser/host_content_settings_map.cc',
         'content_settings/core/browser/host_content_settings_map.h',
         'content_settings/core/browser/local_shared_objects_counter.h',
+        'content_settings/core/browser/plugins_field_trial.cc',
+        'content_settings/core/browser/plugins_field_trial.h',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [4267, ],
     },
     {
       # GN version: //components/content_settings/core/common
       'target_name': 'content_settings_core_common',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 53 matching lines @@
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'content_settings/content/common/content_settings_message_generator.cc',
         'content_settings/content/common/content_settings_message_generator.h',
         'content_settings/content/common/content_settings_messages.h',
       ],
     },
   ],
 }