DevTools: [SSP] force StylesSidebarPane refresh on undo/redo command happens.

The StylesSidebarPane should be force-refreshed on undo/redo command
happens.

BUG=501310
R=pfeldman

Review URL: https://codereview.chromium.org/1221663002

git-svn-id: svn://svn.chromium.org/blink/trunk@198002 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/elements/ElementsPanel.js

@@ -709,8 +709,10 @@ WebInspector.ElementsPanel.prototype = {
 
         if (!treeOutline.editing()) {
             handleUndoRedo.call(null, treeOutline);
-            if (event.handled)
+            if (event.handled) {
+                this.sidebarPanes.styles.onUndoOrRedoHappened();
                 return;
+            }
         }
 
         treeOutline.handleShortcut(event);

third_party/WebKit/Source/devtools/front_end/elements/StylesSidebarPane.js

@@ -137,6 +137,11 @@ WebInspector.StylesSidebarPane.ignoreErrorsForProperty = function(property) {
 }
 
 WebInspector.StylesSidebarPane.prototype = {
+    onUndoOrRedoHappened: function()
+    {
+        this.setNode(this.node());
+    },
+
     /**
      * @param {!WebInspector.Event} event
      */