--- /b/rr/tmpKwCSBB/w/layout-test-results/virtual/threaded/http/tests/devtools/tracing/timeline-misc/timeline-grouped-invalidations-expected.txt
+++ /b/rr/tmpKwCSBB/w/layout-test-results/virtual/threaded/http/tests/devtools/tracing/timeline-misc/timeline-grouped-invalidations-actual.txt
@@ -5,95 +5,33 @@
 S
 S
 paint invalidations[
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:14}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:15}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:14}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:15}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:14}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:15}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:14}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-    {
-        cause : {reason: Inline CSS style declaration was mutated, stackTrace: .../devtools/tracing/timeline-misc/timeline-grouped-invalidations.html:15}
-        changedAttribute : undefined
-        changedClass : undefined
-        changedId : undefined
-        changedPseudo : undefined
-        extraData : ""
-        nodeName : "DIV class='testElement'"
-        selectorPart : undefined
-        type : "StyleRecalcInvalidationTracking"
-    }
-]
-PASS - record contained Inline CSS style declaration was mutated for [ DIV class='testElement' ], [ DIV class='testElement' ], and 2 others. (anonymous) @ timeline-grouped-invalidations.html:14
-PASS - record contained Inline CSS style declaration was mutated for [ DIV class='testElement' ], [ DIV class='testElement' ], and 2 others. (anonymous) @ timeline-grouped-invalidations.html:15
+Exception while running: function () {
+    var event = PerformanceTestRunner.findTimelineEvent(TimelineModel.TimelineModel.RecordType.Paint);
+    TestRunner.addArray(
+        TimelineModel.InvalidationTracker.invalidationEventsFor(event), PerformanceTestRunner.InvalidationFormatters,
+        '', 'paint invalidations');
 
+    var linkifier = new Components.Linkifier();
+    var target = PerformanceTestRunner.timelineModel().targetByEvent(event);
+    var contentHelper = new Timeline.TimelineDetailsContentHelper(target, linkifier, true);
+    Timeline.TimelineUIUtils._generateCauses(event, target, null, contentHelper);
+    var invalidationsTree = contentHelper.element.getElementsByClassName('invalidations-tree')[0];
+    var invalidations = invalidationsTree.shadowRoot.textContent;
+    checkStringContains(
+        invalidations,
+        'Inline CSS style declaration was mutated for [ DIV class=\'testElement\' ], [ DIV class=\'testElement\' ], and 2 others. (anonymous) @ timeline-grouped-invalidations.html:14');
+    checkStringContains(
+        invalidations,
+        'Inline CSS style declaration was mutated for [ DIV class=\'testElement\' ], [ DIV class=\'testElement\' ], and 2 others. (anonymous) @ timeline-grouped-invalidations.html:15');
+    TestRunner.completeTest();
+  }
+TypeError: Cannot read property 'length' of null
+    at Object.TestRunner.addArray (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/integration_test_runner.js:6003:232)
+    at eval (evaluateInWebInspector1.js:65:16)
+    at result (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/integration_test_runner.js:5943:42)
+    at Timeline.TimelinePanel.TestRunner.addSniffer (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/performance_test_runner/performance_test_runner_module.js:5:1190)
+    at Timeline.TimelinePanel.result (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/integration_test_runner.js:5943:42)
+    at Timeline.TimelinePanel.receiver.(anonymous function) (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/integration_test_runner.js:5937:58)
+    at Timeline.TimelineController._finalizeTrace (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/timeline/timeline_module.js:183:99)
+    at setTimeout (file:///b/c/b/mac_layout/src/out/Release/resources/inspector/timeline/timeline_module.js:182:76)
+
