Componentize MetricsServicesManager

components/metrics_services_manager.gypi

 # Copyright 2015 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/security_interstitials/core
-      'target_name': 'security_interstitials_core',
+      # GN version: //components/metrics_services_manager
+      'target_name': 'metrics_services_manager',
       'type': 'static_library',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../net/net.gyp:net',
-        'history_core_browser',
-        'metrics',
-        'rappor',
-      ],
       'include_dirs': [
         '..',
       ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        'metrics',
+        'rappor',
+        'variations',
+      ],
       'sources': [
         # Note: sources list duplicated in GN build.
-        'security_interstitials/core/metrics_helper.cc',
-        'security_interstitials/core/metrics_helper.h',
-      ]
-    }
-  ]
-}
+        'metrics_services_manager/metrics_services_manager.cc',
+        'metrics_services_manager/metrics_services_manager.h',
+        'metrics_services_manager/metrics_services_manager_client.h',
+      ],
+    },
+  ],
+}