Move //chrome/common/metrics/proto to //chrome/browser/metrics/variations/proto.

chrome/chrome_common.gypi

Index: chrome/chrome_common.gypi
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index 2a051e092a1ce8ccbb0c5fad2c9f986012f12d28..a68afe359528aa5d83ff104f3b76ca7b69c39a85 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -288,7 +288,6 @@
         'common_net',
         'common_version',
         'installer_util',
-        'metrics_proto',
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/base/base.gyp:base_i18n',
         '<(DEPTH)/base/base.gyp:base_prefs',
@@ -513,7 +512,6 @@
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
-        'metrics_proto',
       ],
     },
     {
@@ -674,20 +672,5 @@
       },
       'includes': [ '../build/protoc.gypi' ],
     },
-    {
-      # Protobuf compiler / generator for UMA (User Metrics Analysis).
-
-      # GN version: //chrome/common/metrics/proto:proto
-      'target_name': 'metrics_proto',
-      'type': 'static_library',
-      'sources': [
-        'common/metrics/proto/chrome_experiments.proto',
-      ],
-      'variables': {
-        'proto_in_dir': 'common/metrics/proto',
-        'proto_out_dir': 'chrome/common/metrics/proto',
-      },
-      'includes': [ '../build/protoc.gypi' ],
-    },
   ],
 }