Add components and CLD to GN build.

components/translate/core/common/BUILD.gn

Index: components/translate/core/common/BUILD.gn
diff --git a/components/translate/core/common/BUILD.gn b/components/translate/core/common/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..0378ba101a350420802acfb42ece8ad75fbd2a27
--- /dev/null
+++ b/components/translate/core/common/BUILD.gn
@@ -0,0 +1,26 @@
+# 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("common") {
+  sources = [
+    "language_detection_details.cc",
+    "language_detection_details.h",
+    "translate_constants.cc",
+    "translate_constants.h",
+    "translate_errors.h",
+    "translate_metrics.cc",
+    "translate_metrics.h",
+    "translate_pref_names.cc",
+    "translate_pref_names.h",
+    "translate_switches.cc",
+    "translate_switches.h",
+    "translate_util.cc",
+    "translate_util.h",
+  ]
+
+  deps = [
+    "//base",
+    "//url",
+  ]
+}