Add more BUILD.gn files to build these targets with GN.

components/query_parser/BUILD.gn

Index: components/query_parser/BUILD.gn
diff --git a/components/query_parser/BUILD.gn b/components/query_parser/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..9b005464f304aaa6cd5a6c9d456a247c3f4b88a9
--- /dev/null
+++ b/components/query_parser/BUILD.gn
@@ -0,0 +1,18 @@
+# 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.
+
+source_set("query_parser") {
+  sources = [
+    "query_parser.cc",
+    "query_parser.h",
+    "snippet.cc",
+    "snippet.h",
+  ]
+
+  deps = [
+    "//base",
+    "//base:i18n",
+    "//third_party/icu",
+  ]
+}