Issue #1587 - Part 6: Move FetchController/Signal to its own dir

Since it is specced separately from fetch.

dom/abort/moz.build

@@ -0,0 +1,26 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "DOM")
+
+TEST_DIRS += ['tests']
+
+EXPORTS.mozilla.dom += [
+    'FetchController.h',
+    'FetchSignal.h',
+]
+
+UNIFIED_SOURCES += [
+    'FetchController.cpp',
+    'FetchSignal.cpp',
+]
+
+LOCAL_INCLUDES += [
+    '../workers',
+]
+
+FINAL_LIBRARY = 'xul'