DevTools: add extension API to contribute trace events to timeline

third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html

Index: third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html
diff --git a/third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html b/third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html
index 1ed18900af5309b107333ca73411ffd3e217eb9f..c216f2ad83e14462190e1653b95cdd2ffc5cfbac 100644
--- a/third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html
+++ b/third_party/WebKit/LayoutTests/inspector/extensions/extensions-timeline-api.html
@@ -5,33 +5,82 @@
 <script src="../../http/tests/inspector/timeline-test.js"></script>
 
 <script type="text/javascript">
+function initialize_timelineExtensionTest()
+{
+
+InspectorTest.enableTimelineExtensionAndStart = function(callback) {
+    const provider = Extensions.extensionServer.traceProviders().peekLast();
+    const timelinePanel = UI.panels.timeline;
+    const setting = Timeline.TimelinePanel._settingForTraceProvider(provider);
+    setting.set(true);
+    InspectorTest.addResult(`Provider short display name: ${provider.shortDisplayName()}`);
+    InspectorTest.addResult(`Provider long display name: ${provider.longDisplayName()}`);
+    InspectorTest.startTimeline(callback);
+}
+
+}
+
 function extension_testTimeline(nextTest)
 {
-    function onRecordingStarted()
+    var session;
+    var sessionTimeOffset;
+    var startTime;
+
+    function onRecordingStarted(s)
     {
+        sessionTimeOffset = (Date.now() - performance.now()) * 1000;
+        startTime = performance.now();
         output("traceProvider.onRecordingStarted fired.");
-    }
-    function onRecordingStopped()
-    {
+        output("TracingSession:");
+        dumpObject(s);
+        session = s;
+     }
+
+     function onRecordingStopped()
+     {
         output("traceProvider.onRecordingStopped fired.");
-        nextTest();
+
+        const endTime = performance.now();
+        var pid = 1;
+        var tid = 1;
+        var step = (endTime - startTime) * 1000 / 10;
+        var start = startTime * 1000;
+        var data = { "traceEvents": [
+            {"name": "Extension record X 1", "ts": start, "dur": step * 4, "ph": "X", "args": {},  "tid": tid, "pid": pid, "cat":"" },
+            {"name": "Extension record X 2", "ts": start + step * 5, "dur": step * 5, "ph": "X", "args": {},  "tid": tid, "pid": pid, "cat":"" },
+            {"name": "Extension record I 1", "ts": start + step * 5.5, "ph": "I", "args": {},  "tid": tid, "pid": pid, "cat":"" },
+            {"name": "Extension record B+E", "ts": start + step * 6, "ph": "B", "args": {}, "tid": tid, "pid": pid, "cat":"" },
+            {"name": "Extension record B+E", "ts": start + step * 10, "ph": "E", "args": {}, "tid": tid, "pid": pid, "cat":"" }
+        ]};
+        var url = "data:application/json," + escape(JSON.stringify(data));
+        session.complete(url, sessionTimeOffset);
     }
-    var traceProvider = webInspector.timeline.addTraceProvider("extension trace provider", "tooltip");
+
+    var traceProvider = webInspector.timeline.addTraceProvider("extension trace provider", "long extension name");
+    output("TraceProvider:");
     dumpObject(traceProvider);
     traceProvider.onRecordingStarted.addListener(onRecordingStarted);
     traceProvider.onRecordingStopped.addListener(onRecordingStopped);
-    extension_startTimeline(() => extension_stopTimeline(() => {}));
+    extension_startTimeline(
+        () => extension_stopTimeline(
+            () => extension_dumpFlameChart(nextTest)));
 }
 
 function extension_startTimeline(callback)
 {
-    evaluateOnFrontend("InspectorTest.startTimeline(reply);", callback);
+    evaluateOnFrontend("InspectorTest.enableTimelineExtensionAndStart(reply);", callback);
 }
 
 function extension_stopTimeline(callback)
 {
     evaluateOnFrontend("InspectorTest.stopTimeline(reply);", callback);
 }
+
+function extension_dumpFlameChart(callback)
+{
+    evaluateOnFrontend("InspectorTest.dumpTimelineFlameChart(['long extension name']); reply()", callback);
+}
+
 </script>
 </head>
 <body onload="runTest()">