Add components and CLD to GN build.

components/autocomplete/BUILD.gn

+# Copyright 2014 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("autocomplete") {
+  sources = [
+    "autocomplete_input.cc",
+    "autocomplete_input.h",
+    "autocomplete_scheme_classifier.h",
+    "url_prefix.cc",
+    "url_prefix.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/metrics/proto",
+    "//components/url_fixer",
+    "//net",
+    "//url",
+  ]
+}
+
+static_library("test_support") {
+  sources = [
+    "test_scheme_classifier.cc",
+    "test_scheme_classifier.h",
+  ]
+
+  deps = [
+    ":autocomplete",
+    "//base",
+    "//components/metrics/proto",
+  ]
+}