cc: Add checker-imaging support to TileManager.

cc/trees/proxy_impl.cc

Index: cc/trees/proxy_impl.cc
diff --git a/cc/trees/proxy_impl.cc b/cc/trees/proxy_impl.cc
index 0a8620eb7e724c3873aa24afa00413fe39945079..601b1d680004c9161f64ac8b7e1d3d3fbaf51229 100644
--- a/cc/trees/proxy_impl.cc
+++ b/cc/trees/proxy_impl.cc
@@ -432,6 +432,11 @@ void ProxyImpl::OnDrawForCompositorFrameSink(bool resourceless_software_draw) {
   scheduler_->OnDrawForCompositorFrameSink(resourceless_software_draw);
 }
 
+void ProxyImpl::NeedsImplSideInvalidation() {
+  DCHECK(IsImplThread());
+  NOTIMPLEMENTED();

[enne (OOO), 2017/02/16 21:41:32]

Can you leave a TODO with your name on it here and in single thread proxy, so
folks know that this is "in progress" and not "never to be implemented"?

[Khushal, 2017/02/17 19:05:38]

Done.

+}
+
 void ProxyImpl::WillBeginImplFrame(const BeginFrameArgs& args) {
   DCHECK(IsImplThread());
   layer_tree_host_impl_->WillBeginImplFrame(args);