Revert of DevTools: Migrate elements panel undo/redo shortcuts to declarative actions.

Source/devtools/front_end/elements/ElementsPanel.js

Index: Source/devtools/front_end/elements/ElementsPanel.js
diff --git a/Source/devtools/front_end/elements/ElementsPanel.js b/Source/devtools/front_end/elements/ElementsPanel.js
index fcebcf18380f10802525ccc3618effddca4d1f9a..a86493dae54c2e2a4adf8ee3ee0f29bcde80dcb9 100644
--- a/Source/devtools/front_end/elements/ElementsPanel.js
+++ b/Source/devtools/front_end/elements/ElementsPanel.js
@@ -204,7 +204,7 @@
                 else
                     treeOutline.domModel().requestDocument();
         }
-        WebInspector.context.setFlavor(WebInspector.ElementsPanel, this);
+
     },
 
     willHide: function()
@@ -218,7 +218,6 @@
         }
         this._popoverHelper.hidePopover();
         WebInspector.Panel.prototype.willHide.call(this);
-        WebInspector.context.setFlavor(WebInspector.ElementsPanel, null);
     },
 
     onResize: function()
@@ -690,30 +689,44 @@
         this.sidebarPanes.platformFonts.setNode(selectedDOMNode);
     },
 
-    _undo: function()
-    {
-        var treeOutline = this._treeOutlineForNode(this._lastValidSelectedNode);
-        if (!treeOutline || WebInspector.isEditing())
-            return;
-        treeOutline.target().domModel.undo(this._updateSidebars.bind(this));
-    },
-
-    _redo: function()
-    {
-        var treeOutline = this._treeOutlineForNode(this._lastValidSelectedNode);
-        if (!treeOutline || WebInspector.isEditing())
-            return;
-        treeOutline.target().domModel.redo(this._updateSidebars.bind(this));
-    },
-
     /**
      * @param {!KeyboardEvent} event
      */
     handleShortcut: function(event)
     {
-        var treeOutline = this._treeOutlineForNode(this._lastValidSelectedNode);
+        /**
+         * @param {!WebInspector.ElementsTreeOutline} treeOutline
+         * @this {WebInspector.ElementsPanel}
+         */
+        function handleUndoRedo(treeOutline)
+        {
+            if (WebInspector.KeyboardShortcut.eventHasCtrlOrMeta(event) && !event.shiftKey && event.keyIdentifier === "U+005A") { // Z key
+                treeOutline.target().domModel.undo(this._updateSidebars.bind(this));
+                event.handled = true;
+                return;
+            }
+
+            var isRedoKey = WebInspector.isMac() ? event.metaKey && event.shiftKey && event.keyIdentifier === "U+005A" : // Z key
+                                                   event.ctrlKey && event.keyIdentifier === "U+0059"; // Y key
+            if (isRedoKey) {
+                treeOutline.target().domModel.redo(this._updateSidebars.bind(this));
+                event.handled = true;
+            }
+        }
+
+        var treeOutline = null;
+        for (var i = 0; i < this._treeOutlines.length; ++i) {
+            if (this._treeOutlines[i].selectedDOMNode() === this._lastValidSelectedNode)
+                treeOutline = this._treeOutlines[i];
+        }
         if (!treeOutline)
             return;
+
+        if (!treeOutline.editing()) {
+            handleUndoRedo.call(this, treeOutline);
+            if (event.handled)
+                return;
+        }
 
         treeOutline.handleShortcut(event);
         if (event.handled)
@@ -1098,44 +1111,3 @@
         return WebInspector.ElementsPanel.instance();
     }
 }
-
-/**
- * @constructor
- * @implements {WebInspector.ActionDelegate}
- */
-WebInspector.ElementsPanel.UndoActionDelegate = function()
-{
-}
-
-WebInspector.ElementsPanel.UndoActionDelegate.prototype = {
-    /**
-     * @return {boolean}
-     */
-    handleAction: function()
-    {
-        var panel = WebInspector.ElementsPanel.instance();
-        panel._undo();
-        return true;
-    }
-}
-
-/**
- * @constructor
- * @implements {WebInspector.ActionDelegate}
- */
-WebInspector.ElementsPanel.RedoActionDelegate = function()
-{
-}
-
-WebInspector.ElementsPanel.RedoActionDelegate.prototype = {
-    /**
-     * @return {boolean}
-     */
-    handleAction: function()
-    {
-        var panel = WebInspector.ElementsPanel.instance();
-        panel._redo();
-        return true;
-    }
-}
-