[sync] Componentize switches used by ProfileSyncService

components/browser_sync/common/BUILD.gn

Index: components/browser_sync/common/BUILD.gn
diff --git a/blimp/engine/common/BUILD.gn b/components/browser_sync/common/BUILD.gn
similarity index 68%
copy from blimp/engine/common/BUILD.gn
copy to components/browser_sync/common/BUILD.gn
index 48632dc0eda05961a7ae7e2a08dfede33e9688d3..8fcae92bbf091d9f9f017dae4e916585e50b9d3d 100644
--- a/blimp/engine/common/BUILD.gn
+++ b/components/browser_sync/common/BUILD.gn
@@ -2,15 +2,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/features.gni")
+
 source_set("common") {
   sources = [
-    "blimp_content_client.cc",
-    "blimp_content_client.h",
+    "browser_sync_switches.cc",
+    "browser_sync_switches.h",
   ]
 
   deps = [
     "//base",
-    "//content/public/common",
-    "//ui/base",
   ]
 }