Bug 1267401 - part2: include common.css in html tooltip tests;r=bgrins

MozReview-Commit-ID: KyYfOhAv6uo

--HG--
extra : rebase_source : a4c0546f2b55db1306e0cac5526feb64102cdbf7
extra : intermediate-source : c625fa7ed49a83bf0d52a20468527d85d4e2c654
extra : source : d5e3ee2d6861def9002cd60813a9403ff4ad84a8

devtools/client/shared/test/browser_html_tooltip-02.js

@@ -11,6 +11,7 @@
 const HTML_NS = "http://www.w3.org/1999/xhtml";
 const TEST_URI = `data:text/xml;charset=UTF-8,<?xml version="1.0"?>
   <?xml-stylesheet href="chrome://global/skin/global.css"?>
+  <?xml-stylesheet href="chrome://devtools/skin/common.css"?>
   <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
    title="Tooltip test">
     <vbox flex="1">

devtools/client/shared/test/browser_html_tooltip-03.js

@@ -11,6 +11,7 @@
 const HTML_NS = "http://www.w3.org/1999/xhtml";
 const TEST_URI = `data:text/xml;charset=UTF-8,<?xml version="1.0"?>
   <?xml-stylesheet href="chrome://global/skin/global.css"?>
+  <?xml-stylesheet href="chrome://devtools/skin/common.css"?>
   <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
    title="Tooltip test">
     <vbox flex="1">