Bug 1325567 - Added tooltip to rotate viewport button. r=jryans

--HG--
extra : rebase_source : bd7ef1797251da80290ed5ed5cf85b8aa82a95bb

devtools/client/locales/en-US/responsive.properties

@@ -18,6 +18,9 @@ responsive.editDeviceList=Edit list…
 # LOCALIZATION NOTE (responsive.exit): tooltip text of the exit button.
 responsive.exit=Close Responsive Design Mode
 
+# LOCALIZATION NOTE (responsive.rotate): tooltip text of the rotate button.
+responsive.rotate=Rotate viewport
+
 # LOCALIZATION NOTE (responsive.deviceListLoading): placeholder text for
 # device selector when it's still fetching devices
 responsive.deviceListLoading=Loading…

devtools/client/responsive.html/components/viewport-toolbar.js

@@ -7,6 +7,7 @@
 const { DOM: dom, createClass, createFactory, PropTypes, addons } =
   require("devtools/client/shared/vendor/react");
 
+const { getStr } = require("../utils/l10n");
 const Types = require("../types");
 const DeviceSelector = createFactory(require("./device-selector"));
 
@@ -48,6 +49,7 @@ module.exports = createClass({
       dom.button({
         className: "viewport-rotate-button toolbar-button devtools-button",
         onClick: onRotateViewport,
+        title: getStr("responsive.rotate"),
       })
     );
   },