Implement a runtime headless mode for Linux

headless/lib/browser/headless_platform_event_source.cc

Index: headless/lib/browser/headless_platform_event_source.cc
diff --git a/headless/lib/browser/headless_platform_event_source.cc b/headless/lib/browser/headless_platform_event_source.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7c3100ee4f2d167a73677819f410c395f89a2c87
--- /dev/null
+++ b/headless/lib/browser/headless_platform_event_source.cc
@@ -0,0 +1,13 @@
+// Copyright 2016 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.
+
+#include "headless/lib/browser/headless_platform_event_source.h"
+
+namespace headless {
+
+HeadlessPlatformEventSource::HeadlessPlatformEventSource() {}
+
+HeadlessPlatformEventSource::~HeadlessPlatformEventSource() {}
+
+}  // namespace headless