Split browser-specific and generic code in components/task_scheduler_util/.

components/task_scheduler_util/BUILD.gn

 # Copyright 2016 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.
 
-static_library("variations") {
+static_library("browser") {
   sources = [
-    "browser_variations_util.cc",
-    "browser_variations_util.h",
+    "browser/initialization.cc",
+    "browser/initialization.h",
+  ]
+
+  deps = [
+    ":common",
+    "//base",
+    "//base:base_static",
+  ]
+}
+
+static_library("common") {
+  sources = [
+    "common/variations_util.cc",
+    "common/variations_util.h",
   ]
 
   deps = [
     "//base",
-    "//base:base_static",
-    "//components/task_scheduler_util/initialization",
-    "//components/variations",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "browser_variations_util_unittest.cc",
+    "common/variations_util_unittest.cc",
   ]
   deps = [
-    ":variations",
+    ":common",
     "//base",
-    "//components/variations",
     "//testing/gtest",
   ]
 }