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

Index: third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js
diff --git a/third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js b/third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js
index ab910edcf9d541f6eaee72494d9ecbb15701598c..81352ab40b956c16ef4ad5021866940f58e7bc1c 100644
--- a/third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js
+++ b/third_party/WebKit/LayoutTests/paint/invalidation/resources/text-based-repaint.js
@@ -16,6 +16,8 @@ if (window.internals) {
 // 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()
 {
@@ -64,6 +66,10 @@ function checkObjectPaintInvalidations(layersWithInvalidationsText)
     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()