DevTools: zoom is broken in hosted mode

Source/devtools/front_end/ui/ActionRegistry.js

Index: Source/devtools/front_end/ui/ActionRegistry.js
diff --git a/Source/devtools/front_end/ui/ActionRegistry.js b/Source/devtools/front_end/ui/ActionRegistry.js
index 31d6149b3582ccff413d5ee211b75b2f0a652c95..646cb45b759a9ede4222ee9767ee6a1e1d895616 100644
--- a/Source/devtools/front_end/ui/ActionRegistry.js
+++ b/Source/devtools/front_end/ui/ActionRegistry.js
@@ -50,21 +50,21 @@ WebInspector.ActionRegistry.prototype = {
 
     /**
      * @param {string} actionId
-     * @return {boolean}
+     * @return {!Promise.<boolean>}
      */
     execute: function(actionId)
     {
         var extension = this._actionsById.get(actionId);
         console.assert(extension, "No action found for actionId '" + actionId + "'");
-        extension.instancePromise().then(handleAction).done();
-        return !!extension;
+        return extension.instancePromise().then(handleAction);
 
         /**
          * @param {!Object} actionDelegate
+         * @return {boolean}
          */
         function handleAction(actionDelegate)
         {
-            /** @type {!WebInspector.ActionDelegate} */(actionDelegate).handleAction(WebInspector.context);
+            return /** @type {!WebInspector.ActionDelegate} */(actionDelegate).handleAction(WebInspector.context);
         }
     }
 }
@@ -79,7 +79,8 @@ WebInspector.ActionDelegate = function()
 WebInspector.ActionDelegate.prototype = {
     /**
      * @param {!WebInspector.Context} context
-     * @return {boolean}
+     * @return {boolean} True if handled. Note that lazily loaded modules won't be able to consume
+     *                   platform events from their actions.
      */
     handleAction: function(context) {}
 }