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

ios/chrome/browser/autocomplete/BUILD.gn

Index: ios/chrome/browser/autocomplete/BUILD.gn
diff --git a/ios/chrome/browser/autocomplete/BUILD.gn b/ios/chrome/browser/autocomplete/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..070275a0a0b8bc84f547fb2e7df4893aeb2f244a
--- /dev/null
+++ b/ios/chrome/browser/autocomplete/BUILD.gn
@@ -0,0 +1,37 @@
+# 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("autocomplete") {
+  sources = [
+    "autocomplete_classifier_factory.cc",
+    "autocomplete_classifier_factory.h",
+    "autocomplete_provider_client_impl.cc",
+    "autocomplete_provider_client_impl.h",
+    "autocomplete_scheme_classifier_impl.h",
+    "autocomplete_scheme_classifier_impl.mm",
+    "in_memory_url_index_factory.cc",
+    "in_memory_url_index_factory.h",
+    "shortcuts_backend_factory.h",
+    "shortcuts_backend_factory.mm",
+  ]
+  deps = [
+    "//base",
+    "//components/browser_sync",
+    "//components/history/core/browser",
+    "//components/keyed_service/core",
+    "//components/keyed_service/ios",
+    "//components/omnibox/browser",
+    "//components/prefs",
+    "//components/sync",
+    "//ios/chrome/browser:browser_no_public_deps",
+    "//ios/chrome/browser/bookmarks",
+    "//ios/chrome/browser/browser_state",
+    "//ios/chrome/browser/history",
+    "//ios/chrome/browser/search_engines",
+    "//ios/chrome/browser/sync",
+    "//ios/public/provider/chrome/browser",
+    "//ios/web",
+    "//url",
+  ]
+}