Add ability to add/edit cookie in Chrome Dev Tool (front-end)

third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js

Index: third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js b/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
index 00faa50fe523dd4191da8576dfea490f5f9d2ba0..ca468b7e7714e30b724c5ca72047f9b19a7e92ef 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui_lazy/DataGrid.js
@@ -1212,6 +1212,8 @@ WebInspector.DataGridNode = function(data, hasChildren)
     this._expanded = false;
     /** @type {boolean} */
     this._selected = false;
+    /** @type {boolean} */
+    this._unsaved = false;
     /** @type {number|undefined} */
     this._depth;
     /** @type {boolean|undefined} */
@@ -1275,6 +1277,8 @@ WebInspector.DataGridNode.prototype = {
             this._element.classList.add("selected");
         if (this.revealed)
             this._element.classList.add("revealed");
+        if (this.unsaved)
+            this._element.classList.add("unsaved");
     },
 
     /**
@@ -1396,6 +1400,22 @@ WebInspector.DataGridNode.prototype = {
             this.deselect();
     },
 
+    get unsaved()
+    {
+        return this._unsaved;
+    },
+
+    set unsaved(x)
+    {
+        this._unsaved = x;
+        if (!this._element)
+            return;
+        if (x)
+            this._element.classList.add("unsaved");
+        else
+            this._element.classList.remove("unsaved");
+    },
+
     get expanded()
     {
         return this._expanded;
@@ -1467,7 +1487,7 @@ WebInspector.DataGridNode.prototype = {
         var data = this.data[columnIdentifier];
         if (data instanceof Node) {
             cell.appendChild(data);
-        } else {
+        } else if (data !== null) {
             cell.textContent = data;
             if (this.dataGrid._columns[columnIdentifier].longText)
                 cell.title = data;