cc: Add checker-imaging support to TileManager.

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 0bb9a54f624447c8c6f5ed482fe3b488d0c6ea75..98cc3a99b130a8eddafad102dedd12b1d64fd440 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -173,6 +173,7 @@ class LayerTreeHostImplTest : public testing::Test,
     host_impl_->DidDrawAllLayers(*frame);
     last_on_draw_frame_ = std::move(frame);
   }
+  void NeedsImplSideInvalidation() override {}
 
   void set_reduce_memory_result(bool reduce_memory_result) {
     reduce_memory_result_ = reduce_memory_result;