Add a test that rects with fixed-size SVGs don't get invalidated on resize of container.

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 = [];
+// Objects which must *not* be invalidated.
+window.expectedObjectNonInvalidations = [];
 
 function runRepaintTest()
 {
     if (!window.testRunner || !window.internals) {
         setTimeout(repaintTest, 500);
         return;
     }
 
     if (window.enablePixelTesting)
         testRunner.dumpAsTextWithPixelResults();
@@ skipping 28 matching lines @@
     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 + "'");
     });
+
+    window.expectedObjectNonInvalidations.forEach(function(objectName) {
+        assert_false(objectNameSet.has(objectName), "Expected object to be invalidated, but it was not: '" + objectName + "'");

[fs, 2016/10/07 07:55:33]

Nit: Need to move the "not" in the description text.

[chrishtr, 2016/10/07 16:41:09]

Done.

+    });
 }
 
 function finishRepaintTest()
 {
     if (!window.testRunner || !window.internals)
         return;
 
     // Force a style recalc.
     forceStyleRecalc();
 
@@ skipping 18 matching lines @@
     if (window.outputRepaintRects)
         testRunner.setCustomTextOutput(layersWithInvalidationsText);
 
     if (window.afterTest)
         window.afterTest();
 
     // Play nice with async JS tests which want to notifyDone themselves.
     if (!window.jsTestIsAsync)
         testRunner.notifyDone();
 }