Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmllite/BUILD.gn

Index: webrtc/libjingle/xmllite/BUILD.gn
diff --git a/webrtc/libjingle/xmllite/BUILD.gn b/webrtc/libjingle/xmllite/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..496d452bd82d426a091fe1aa7f682c6010a9d131
--- /dev/null
+++ b/webrtc/libjingle/xmllite/BUILD.gn
@@ -0,0 +1,51 @@
+# Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+import("../../build/webrtc.gni")
+
+group("xmllite") {
+  public_deps = [
+    ":rtc_xmllite",
+  ]
+}
+
+rtc_static_library("rtc_xmllite") {
+  sources = [
+    "qname.cc",
+    "qname.h",
+    "xmlbuilder.cc",
+    "xmlbuilder.h",
+    "xmlconstants.cc",
+    "xmlconstants.h",
+    "xmlelement.cc",
+    "xmlelement.h",
+    "xmlnsstack.cc",
+    "xmlnsstack.h",
+    "xmlparser.cc",
+    "xmlparser.h",
+    "xmlprinter.cc",
+    "xmlprinter.h",
+  ]
+
+  deps = [
+    "../../base:rtc_base",
+  ]
+
+  if (rtc_build_expat) {
+    deps += [ "//third_party/expat" ]
+    public_deps = [
+      "//third_party/expat",
+    ]
+  }
+
+  if (!build_with_chromium && is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
+  }
+}