DevTools: add per-frame grouping into aggregated timeline details

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

 // Copyright 2014 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.
 
 var evalCallbackCallId = 3;
 
 initialize_tracingHarness = function()
 {
 
 InspectorTest.startTracing = function(callback)
@@ skipping 92 matching lines @@
         if (response.eof) {
             // Ignore stray callbacks from proactive read requests.
             had_eof = true;
             callback(result);
             return;
         }
         InspectorTest.sendCommandOrDie("IO.read", readArguments, onChunkRead);
     }
 }
 
+InspectorTest.findEvents = function(name, ph, condition)
+{
+    return InspectorTest.devtoolsEvents.filter(e => e.name === name && e.ph === ph && (!condition || condition(e)));
+}
+
 InspectorTest.findEvent = function(name, ph, condition)
 {
-    for (var i = 0; i < InspectorTest.devtoolsEvents.length; i++) {
-        var e = InspectorTest.devtoolsEvents[i];
-        if (e.name === name && e.ph === ph && (!condition || condition(e)))
-            return e;
-    }
+    var events = InspectorTest.findEvents(name, ph, condition);
+    if (events.length)
+        return events[0];
     throw new Error("Couldn't find event " + name + " / " + ph + "\n\n in " + JSON.stringify(InspectorTest.devtoolsEvents, null, 2));
 }
 
 InspectorTest.invokeAsyncWithTracing = function(functionName, callback)
 {
     InspectorTest.startTracing(onStart);
 
     function onStart()
     {
         InspectorTest.evaluateInPageAsync(functionName + "()").then((data) => InspectorTest.stopTracing((devtoolsEvents) => callback(devtoolsEvents, data)));
     }
 }
 
 }