components: Add GN build files for three more components.

components/omaha_query_params/BUILD.gn

Index: components/omaha_query_params/BUILD.gn
diff --git a/components/omaha_query_params/BUILD.gn b/components/omaha_query_params/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..7d2089a73f3da25d920d705aa45a179b462526b0
--- /dev/null
+++ b/components/omaha_query_params/BUILD.gn
@@ -0,0 +1,16 @@
+# 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("omaha_query_params") {
+  sources = [
+    "omaha_query_params.cc",
+    "omaha_query_params.h",
+    "omaha_query_params_delegate.cc",
+    "omaha_query_params_delegate.h",
+  ]
+
+  deps = [
+    "//base",
+  ]
+}