DevTools: copy protocol files to front-end to fix hosted mode

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

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This should be executed immediately after InspectorBackend and InspectorBackendCommands
 
 WebInspector.InspectorBackendHostedMode = {};
 
 /**
- * @param {string} jsonUrl
+ * @param {!Array<string>} urls
+ * @return {?Promise}
  */
-WebInspector.InspectorBackendHostedMode.loadFromJSONIfNeeded = function(jsonUrl)
+WebInspector.InspectorBackendHostedMode.loadFromJSONIfNeeded = function(urls)
 {
     if (InspectorBackend.isInitialized())
-        return;
+        return null;
 
-    var xhr = new XMLHttpRequest();
-    xhr.open("GET", jsonUrl, false);
-    xhr.send(null);
+    var promises = urls.map(url => loadURL(url));
+    return Promise.all(promises);
 
-    var schema = JSON.parse(xhr.responseText);
-    var code = WebInspector.InspectorBackendHostedMode.generateCommands(schema);
-    eval(code);
+    /**
+     * @param {string} url
+     * @return {!Promise}
+     */
+    function loadURL(url)
+    {
+        return fetch(url)
+            .then(response => response.text())

[pfeldman, 2016/07/07 23:25:44]

I consider this an anti-pattern. Sync code should be executed synchronously,
there is no point in introducing overhead of instantiated promises and
microtasks.

+            .then(schema => WebInspector.InspectorBackendHostedMode.generateCommands(JSON.parse(schema)))
+            .then(code => eval(code));
+    }
 }
 
 /**
  * @param {*} schema
  * @return {string}
  */
 WebInspector.InspectorBackendHostedMode.generateCommands = function(schema)
 {
     var jsTypes = { integer: "number", array: "object" };
     var rawTypes = {};
@@ skipping 81 matching lines @@
             for (var k = 0; event.parameters && k < event.parameters.length; ++k) {
                 var parameter = event.parameters[k];
                 paramsText.push("\"" + parameter.name + "\"");
             }
             result.push("InspectorBackend.registerEvent(\"" + domain.domain + "." + event.name + "\", [" + paramsText.join(", ") + "]);");
         }
     }
     return result.join("\n");
 }
 
-WebInspector.InspectorBackendHostedMode.loadFromJSONIfNeeded("../inspector.json");
+WebInspector.InspectorBackendHostedMode.loadFromJSONIfNeeded([
+    "../sdk/protocol/browser_protocol.json",
+    "../sdk/protocol/js_protocol.json"
+]);