Componentize ProfileMetrics::Counts

components/profile_metrics/BUILD.gn

Index: components/profile_metrics/BUILD.gn
diff --git a/components/profile_metrics/BUILD.gn b/components/profile_metrics/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..8adf08bb883a006b9699da491da11b4925d067ab
--- /dev/null
+++ b/components/profile_metrics/BUILD.gn
@@ -0,0 +1,15 @@
+# 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.
+
+# GYP version: components/profile_metrics.gypi:profile_metrics
+static_library("profile_metrics") {
+  sources = [
+    "counts.cc",
+    "counts.h",
+  ]
+
+  deps = [
+    "//base",
+  ]
+}