[Clean Skeleton] Migrate code to clean/

ios/clean/chrome/browser/BUILD.gn

Index: ios/clean/chrome/browser/BUILD.gn
diff --git a/ios/clean/chrome/browser/BUILD.gn b/ios/clean/chrome/browser/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..e167cbe9ddb805b3d476b7030b955911848d5a72
--- /dev/null
+++ b/ios/clean/chrome/browser/BUILD.gn
@@ -0,0 +1,20 @@
+# 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.
+
+source_set("browser") {
+  sources = [
+    "browser_coordinator+internal.h",
+    "browser_coordinator.h",
+    "browser_coordinator.mm",
+    "url_opening.h",
+  ]
+
+  configs += [ "//build/config/compiler:enable_arc" ]
+
+  deps = [
+    "//base",
+    "//ios/chrome/browser",
+    "//ios/chrome/browser/browser_state",
+  ]
+}