Add remoting and PPAPI tests to GN build

remoting/host/native_messaging/BUILD.gn

Index: remoting/host/native_messaging/BUILD.gn
diff --git a/remoting/host/native_messaging/BUILD.gn b/remoting/host/native_messaging/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..312546d572cbe8d386db77463e733b7ff769b908
--- /dev/null
+++ b/remoting/host/native_messaging/BUILD.gn
@@ -0,0 +1,23 @@
+# Copyright 2015 The Chromium Authors. All rights reserved.

[kelvinp, 2015/02/27 21:00:57]

Can we define the source files in a gypi file like the other places to avoid
duplicating the set of files?

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# GYP version: remoting/remoting_host.gypi:remoting_native_messaging_base
+source_set("native_messaging") {
+  sources = [
+    "native_messaging_pipe.cc",
+    "native_messaging_pipe.h",
+    "native_messaging_reader.cc",
+    "native_messaging_reader.h",
+    "native_messaging_writer.cc",
+    "native_messaging_writer.h",
+    "pipe_messaging_channel.cc",
+    "pipe_messaging_channel.h",
+  ]
+
+  configs += [ "//build/config/compiler:wexit_time_destructors" ]
+
+  deps = [
+    "//base",
+  ]
+}