Split picture layer quads to allow removing more occluded area.

cc/layers/painted_scrollbar_layer_impl_unittest.cc

Index: cc/layers/painted_scrollbar_layer_impl_unittest.cc
diff --git a/cc/layers/painted_scrollbar_layer_impl_unittest.cc b/cc/layers/painted_scrollbar_layer_impl_unittest.cc
index 3932b0ecee743e4bc2414f1f7aa3843f36dba7d4..2502655a75a5df5b21d336a8187c926b380eda43 100644
--- a/cc/layers/painted_scrollbar_layer_impl_unittest.cc
+++ b/cc/layers/painted_scrollbar_layer_impl_unittest.cc
@@ -72,8 +72,8 @@ TEST(PaintedScrollbarLayerImplTest, Occlusion) {
     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
 
     size_t partially_occluded_count = 0;
-    LayerTestCommon::VerifyQuadsAreOccluded(
-        impl.quad_list(), occluded, &partially_occluded_count);
+    LayerTestCommon::VerifyQuadsAreOccluded(impl.quad_list(), occluded, false,
+                                            &partially_occluded_count);
     EXPECT_EQ(2u, impl.quad_list().size());
     EXPECT_EQ(0u, partially_occluded_count);
 
@@ -124,8 +124,8 @@ TEST(PaintedScrollbarLayerImplTest, Occlusion) {
     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
 
     size_t partially_occluded_count = 0;
-    LayerTestCommon::VerifyQuadsAreOccluded(
-        impl.quad_list(), occluded, &partially_occluded_count);
+    LayerTestCommon::VerifyQuadsAreOccluded(impl.quad_list(), occluded, false,
+                                            &partially_occluded_count);
     // The layer outputs two quads, which is partially occluded.
     EXPECT_EQ(2u, impl.quad_list().size());
     EXPECT_EQ(2u, partially_occluded_count);