Revert "Remove WebIDE devtools component."

This reverts commit 8c1500707f.

# Conflicts:
#	application/basilisk/components/customizableui/CustomizableUI.jsm

devtools/client/webide/moz.build

@@ -0,0 +1,23 @@
+# -*- 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/.
+
+DIRS += [
+    'content',
+    'components',
+    'modules',
+    'themes',
+]
+
+BROWSER_CHROME_MANIFESTS += [
+    'test/browser.ini'
+]
+MOCHITEST_CHROME_MANIFESTS += [
+    'test/chrome.ini'
+]
+
+JS_PREFERENCE_PP_FILES += [
+    'webide-prefs.js',
+]