Split //ios/chrome/browser in multiple targets.

ios/chrome/browser/sync/BUILD.gn

Index: ios/chrome/browser/sync/BUILD.gn
diff --git a/ios/chrome/browser/sync/BUILD.gn b/ios/chrome/browser/sync/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..d04e12c857638a9a33e717237fe19646543891d4
--- /dev/null
+++ b/ios/chrome/browser/sync/BUILD.gn
@@ -0,0 +1,98 @@
+# 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.
+
+source_set("sync") {
+  sources = [
+    "ios_chrome_profile_sync_service_factory.cc",
+    "ios_chrome_profile_sync_service_factory.h",
+    "ios_chrome_sync_client.h",
+    "ios_chrome_sync_client.mm",
+    "ios_chrome_synced_tab_delegate.h",
+    "ios_chrome_synced_tab_delegate.mm",
+    "sync_observer_bridge.h",
+    "sync_observer_bridge.mm",
+    "sync_setup_service.cc",
+    "sync_setup_service.h",
+    "sync_setup_service_factory.cc",
+    "sync_setup_service_factory.h",
+  ]
+  deps = [
+    "//base",
+    "//components/autofill/core/browser",
+    "//components/browser_sync",
+    "//components/dom_distiller/core",
+    "//components/history/core/browser",
+    "//components/invalidation/impl",
+    "//components/keyed_service/core",
+    "//components/keyed_service/ios",
+    "//components/network_time",
+    "//components/password_manager/core/browser",
+    "//components/password_manager/sync/browser",
+    "//components/prefs",
+    "//components/search_engines",
+    "//components/sessions",
+    "//components/signin/core/browser",
+    "//components/sync",
+    "//components/sync_sessions",
+    "//components/syncable_prefs",
+    "//google_apis",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/autofill",
+    "//ios/chrome/browser/bookmarks",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/dom_distiller",
+    "//ios/chrome/browser/favicon",
+    "//ios/chrome/browser/history",
+    "//ios/chrome/browser/invalidation",
+    "//ios/chrome/browser/passwords",
+    "//ios/chrome/browser/search_engines",
+    "//ios/chrome/browser/services/gcm",
+    "//ios/chrome/browser/sessions",
+    "//ios/chrome/browser/signin",
+    "//ios/chrome/browser/sync/glue",
+    "//ios/chrome/browser/sync/sessions",
+    "//ios/chrome/browser/undo",
+    "//ios/chrome/common",
+    "//ios/public/provider/chrome/browser",
+    "//ios/web",
+    "//net",
+    "//ui/base",
+    "//url",
+  ]
+  allow_circular_includes_from = [
+    "//ios/chrome/browser/history",
+    "//ios/chrome/browser/passwords",
+    "//ios/chrome/browser/signin",
+    "//ios/chrome/browser/sync/glue",
+    "//ios/chrome/browser/sync/sessions",
+  ]
+}
+
+source_set("test_support") {
+  testonly = true
+  sources = [
+    "fake_sync_service_factory.cc",
+    "fake_sync_service_factory.h",
+    "ios_chrome_profile_sync_test_util.cc",
+    "ios_chrome_profile_sync_test_util.h",
+    "sync_setup_service_mock.cc",
+    "sync_setup_service_mock.h",
+  ]
+  deps = [
+    ":sync",
+    "//base",
+    "//components/browser_sync",
+    "//components/browser_sync:test_support",
+    "//components/keyed_service/core",
+    "//components/keyed_service/ios",
+    "//components/signin/core/browser",
+    "//components/sync",
+    "//components/sync:test_support_driver",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/signin",
+    "//ios/chrome/common",
+    "//ios/web",
+    "//testing/gmock",
+  ]
+}