[Devtools] Added product entry tests for network

third_party/WebKit/LayoutTests/http/tests/inspector/inspector-test.js

 if (window.GCController)
     GCController.collectAll();
 
 var initialize_InspectorTest = function() {
 Protocol.InspectorBackend.Options.suppressRequestErrors = true;
 var results = [];
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
@@ skipping 409 matching lines @@
 {
     InspectorTest.addResult(view instanceof Sources.SourcesNavigatorView ? "Sources:" : "Content Scripts:");
     view._groupByFrame = mode.includes("frame");
     view._groupByDomain = mode.includes("domain");
     view._groupByFolder = mode.includes("folder");
     view._resetForTest();
     InspectorTest.addResult("-------- Setting mode: [" + mode + "]");
     InspectorTest.dumpNavigatorView(view);
 }
 
+/**
+ * @param {symbol} event
+ * @param {!Common.Object} obj
+ * @param {(function(?):boolean)|undefined}
+ * @return {!Promise}
+ */
+InspectorTest.waitEventListener = function(event, obj, condition = undefined)
+{
+    condition = condition || function() { return true;};
+    return new Promise(resolve => {
+        obj.addEventListener(event, onEventFired);
+
+        function onEventFired(event) {
+            if (!condition(event.data))
+                return;
+            obj.removeEventListener(event, onEventFired);
+            resolve(event.data);
+        }
+    });
+}
+
 InspectorTest.waitForUISourceCode = function(urlSuffix, projectType)
 {
     function matches(uiSourceCode)
     {
         if (projectType && uiSourceCode.project().type() !== projectType)
             return false;
         if (!projectType && uiSourceCode.project().type() === Workspace.projectTypes.Service)
             return false;
         if (urlSuffix && !uiSourceCode.url().endsWith(urlSuffix))
             return false;
@@ skipping 859 matching lines @@
     _output("[page] " + text);
 }
 
 function _output(result)
 {
     if (!outputElement)
         createOutputElement();
     outputElement.appendChild(document.createTextNode(result));
     outputElement.appendChild(document.createElement("br"));
 }