cc: Add checker-imaging support to TileManager.

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 4f6bfdb2981a21197bad72053e068f6b34ae6fd8..f892a11ee76cefd5b9382ed6828ff5f38ed50b43 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -1369,4 +1369,23 @@ bool PictureLayerImpl::HasValidTilePriorities() const {
          is_drawn_render_surface_layer_list_member();
 }
 
+void PictureLayerImpl::InvalidateRegionForImages(
+    const std::unordered_set<ImageId>& images_to_invalidate) {
+  InvalidationRegion image_invalidation;
+  for (auto image_id : images_to_invalidate) {
+    image_invalidation.Union(raster_source_->GetRectForImage(image_id));
+  }
+
+  if (image_invalidation.IsEmpty())
+    return;
+
+  Region invalidation;
+  image_invalidation.Swap(&invalidation);
+  TRACE_EVENT1("cc", "PictureLayerImpl::InvalidatingForImages", "invalidation",
+               invalidation.ToString());
+  invalidation_.Union(invalidation);
+  tilings_->UpdateTilingsForImplSideInvalidation(invalidation);
+  layer_tree_impl()->AddLayerShouldPushProperties(this);

[vmpstr, 2017/02/03 23:42:31]

SetNeedsPushProperties();

[Khushal, 2017/02/07 00:25:32]

Done.

+}
+
 }  // namespace cc