Disable two compositor layer tests

Disable
LayerWithDelegateTest.Cloning
LayerWithNullDelegateTest.SwitchLayerPreservesCCLayerState
for Linux and UNDEFINED_SANITIZER due to bot UBSanVptr Linux.

Bug: 989936
Change-Id: Ieb732e3ded4efd15277dee6b210336b58201242d
Tbr: flackr@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1731756Reviewed-by: Owen Min <zmin@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683327}

ui/compositor/layer_unittest.cc

@@ -774,7 +774,13 @@ TEST_P(LayerWithRealCompositorTest, HierarchyNoTexture) {
   EXPECT_TRUE(d3.painted());
 }
 
-TEST_F(LayerWithDelegateTest, Cloning) {
+// crbug.com/989936
+#if defined(OS_LINUX) && defined(UNDEFINED_SANITIZER)
+#define MAYBE_Cloning DISABLED_Cloning
+#else
+#define MAYBE_Cloning Cloning
+#endif
+TEST_F(LayerWithDelegateTest, MAYBE_Cloning) {
   std::unique_ptr<Layer> layer = CreateLayer(LAYER_SOLID_COLOR);
 
   gfx::Transform transform;
@@ -1039,8 +1045,14 @@ TEST_F(LayerWithNullDelegateTest, EscapedDebugNames) {
   ASSERT_TRUE(roundtrip);
   EXPECT_EQ(name, *roundtrip);
 }
-
-TEST_F(LayerWithNullDelegateTest, SwitchLayerPreservesCCLayerState) {
+// crbug.com/989936
+#if defined(OS_LINUX) && defined(UNDEFINED_SANITIZER)
+#define MAYBE_SwitchLayerPreservesCCLayerState \
+  DISABLED_SwitchLayerPreservesCCLayerState
+#else
+#define MAYBE_SwitchLayerPreservesCCLayerState SwitchLayerPreservesCCLayerState
+#endif
+TEST_F(LayerWithNullDelegateTest, MAYBE_SwitchLayerPreservesCCLayerState) {
   std::unique_ptr<Layer> l1 = CreateLayer(LAYER_SOLID_COLOR);
   l1->SetFillsBoundsOpaquely(true);
   l1->SetVisible(false);