diff -r 000000000000 -r 6474c204b198 browser/devtools/eyedropper/commands.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/eyedropper/commands.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const gcli = require("gcli/index");
+const EventEmitter = require("devtools/toolkit/event-emitter");
+const eventEmitter = new EventEmitter();
+
+let { Eyedropper, EyedropperManager } = require("devtools/eyedropper/eyedropper");
+
+/**
+ * 'eyedropper' command
+ */
+exports.items = [{
+  name: "eyedropper",
+  description: gcli.lookup("eyedropperDesc"),
+  manual: gcli.lookup("eyedropperManual"),
+  buttonId: "command-button-eyedropper",
+  buttonClass: "command-button command-button-invertable",
+  tooltipText: gcli.lookup("eyedropperTooltip"),
+  state: {
+    isChecked: function(target) {
+      let chromeWindow = target.tab.ownerDocument.defaultView;
+      let dropper = EyedropperManager.getInstance(chromeWindow);
+      if (dropper) {
+        return true;
+      }
+      return false;
+    },
+    onChange: function(target, changeHandler) {
+      eventEmitter.on("changed", changeHandler);
+    },
+    offChange: function(target, changeHandler) {
+      eventEmitter.off("changed", changeHandler);
+    },
+  },
+  exec: function(args, context) {
+    let chromeWindow = context.environment.chromeWindow;
+    let target = context.environment.target;
+
+    let dropper = EyedropperManager.createInstance(chromeWindow);
+    dropper.open();
+
+    eventEmitter.emit("changed", target.tab);
+
+    dropper.once("destroy", () => {
+      eventEmitter.emit("changed", target.tab);
+    });
+  }
+}];