cc: Keep PaintImage in DrawImage.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 42c83bfdd267f8cdc77f8da36734c6a91c1b7be3..b5071502b3c4243aba74801d68bb5d924ffe24c2 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -12317,8 +12317,8 @@ TEST_F(LayerTreeHostImplTest, CheckerImagingTileInvalidation) {
 
   std::unique_ptr<FakeRecordingSource> recording_source =
       FakeRecordingSource::CreateFilledRecordingSource(layer_size);
-  sk_sp<SkImage> checkerable_image =
-      CreateDiscardableImage(gfx::Size(500, 500));
+  PaintImage checkerable_image = PaintImage(
+      PaintImage::GetNextId(), CreateDiscardableImage(gfx::Size(500, 500)));
   recording_source->add_draw_image(checkerable_image, gfx::Point(0, 0));
 
   SkColor non_solid_color = SkColorSetARGB(128, 45, 56, 67);
@@ -12378,7 +12378,7 @@ TEST_F(LayerTreeHostImplTest, CheckerImagingTileInvalidation) {
       EXPECT_FALSE(tile->HasRasterTask());
   }
   Region expected_invalidation(
-      raster_source->GetRectForImage(checkerable_image->uniqueID()));
+      raster_source->GetRectForImage(checkerable_image.stable_id()));
   EXPECT_EQ(expected_invalidation, *(root->GetPendingInvalidation()));
 }