GN rules for everything in //mojo

mojo/examples/compositor_app/BUILD.gn

+# 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.
+
+import("//mojo/system.gni")
+
+# GYP version mojo/mojo_examples.gypi:mojo_compositor_app
+shared_library("compositor_app") {
+  output_name = "mojo_compositor_app"
+
+  sources = [
+    "compositor_app.cc",
+    "compositor_host.cc",
+    "compositor_host.h",
+  ]
+
+  deps = [
+    "//base",
+    "//cc",
+    "//mojo/cc",
+    "//mojo/common",
+    "//mojo/public/cpp/application:chromium",
+    "//mojo/services/public/cpp/geometry",
+    "//mojo/services/public/interfaces/geometry",
+    "//mojo/services/public/interfaces/gpu",
+    "//mojo/services/public/interfaces/native_viewport",
+  ] + mojo_system_for_shared_library + mojo_gles2_for_shared_library
+}