Mark children of an SVG root as needing paint invalidation checking on resize.

third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js

 // Asynchronous tests should manually call finishRepaintTest at the appropriate
 // time.
 window.testIsAsync = false;
 window.outputRepaintRects = true;
 window.outputLayerList = false;
 
 // All repaint tests are asynchronous.
 if (window.testRunner)
     testRunner.waitUntilDone();
 
 if (window.internals) {
     internals.settings.setUseDefaultImageInterpolationQuality(true);
     internals.runtimeFlags.paintUnderInvalidationCheckingEnabled = true;
 }
 
+// Add string names of objects that should be invalidated here. If you use this feature,
+// you must also include testharness.js.
+window.expectedObjectInvalidations = [];
+
 function runRepaintTest()
 {
     if (!window.testRunner || !window.internals) {
         setTimeout(repaintTest, 500);
         return;
     }
 
     if (window.enablePixelTesting)
         testRunner.dumpAsTextWithPixelResults();
     else
@@ skipping 14 matching lines @@
 }
 
 function forceStyleRecalc()
 {
     if (document.body)
         document.body.clientTop;
     else if (document.documentElement)
         document.documentElement.clientTop;
 }
 
+function checkObjectPaintInvalidations(layersWithInvalidationsText)
+{
+    var layersWithInvalidations = JSON.parse(layersWithInvalidationsText);
+    var objectNameSet = new Set();
+    if (layersWithInvalidations["objectPaintInvalidations"]) {
+        layersWithInvalidations["objectPaintInvalidations"].forEach(function(obj) {
+            objectNameSet.add(obj["object"]);
+        });
+    }
+
+    window.expectedObjectInvalidations.forEach(function(objectName) {
+        assert_true(objectNameSet.has(objectName), "Expected object to be invalidated, but it was not: '" + objectName + "'");
+    });
+}
+
 function finishRepaintTest()
 {
     if (!window.testRunner || !window.internals)
         return;
 
     // Force a style recalc.
     forceStyleRecalc();
 
     var flags = window.internals.LAYER_TREE_INCLUDES_PAINT_INVALIDATIONS;
 
     if (window.layerTreeAsTextAdditionalFlags)
         flags |= window.layerTreeAsTextAdditionalFlags;
 
     if (window.outputLayerList)
         flags |= window.internals.OUTPUT_CHILDREN_AS_LAYER_LIST;
 
-    var repaintRects = window.internals.layerTreeAsText(document, flags);
+    var layersWithInvalidationsText = window.internals.layerTreeAsText(document, flags);
+
+    checkObjectPaintInvalidations(layersWithInvalidationsText);
 
     internals.stopTrackingRepaints(document);
 
     // Play nice with JS tests which may want to print out assert results.
     if (window.isJsTest)
         window.outputRepaintRects = false;
 
     if (window.outputRepaintRects)
-        testRunner.setCustomTextOutput(repaintRects);
+        testRunner.setCustomTextOutput(layersWithInvalidationsText);
 
     if (window.afterTest)
         window.afterTest();
 
     // Play nice with async JS tests which want to notifyDone themselves.
     if (!window.jsTestIsAsync)
         testRunner.notifyDone();
 }