DevTools: allow reattaching main target live.

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

Index: third_party/WebKit/Source/devtools/front_end/devtools.js
diff --git a/third_party/WebKit/Source/devtools/front_end/devtools.js b/third_party/WebKit/Source/devtools/front_end/devtools.js
index 3d2d29a85f188066e4b4d6ce5c3c29398ff7b64a..a5f42585b70df6388adb55273761026f17900bd5 100644
--- a/third_party/WebKit/Source/devtools/front_end/devtools.js
+++ b/third_party/WebKit/Source/devtools/front_end/devtools.js
@@ -691,6 +691,15 @@ InspectorFrontendHostImpl.prototype = {
 
     /**
      * @override
+     * @param {function()} callback
+     */
+    reattach: function(callback)
+    {
+        DevToolsAPI.sendMessageToEmbedder("reattach", [], /** @type {function(?Object)} */ (callback));

[dgozman, 2016/10/15 00:26:26]

no cast

+    },
+
+    /**
+     * @override
      */
     readyForTest: function()
     {