DevTools: add per-frame grouping into aggregated timeline details

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

Index: third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js b/third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js
index 7524497e30c7fe21381c67b521cf1415fe031b6d..0c545b56164c1f4c2583754af0934c562e8b66d8 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js
@@ -110,13 +110,16 @@ InspectorTest.retrieveStream = function(streamHandle, offset, chunkSize, callbac
     }
 }
 
+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));
 }