cc: Force commit on the frame after a copy request

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 0ce5d0e0cf526aa3885d15b1aba47b2cf9d0584c..2f456ade9e4485b8827d901d383353ef8a354b20 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1067,6 +1067,14 @@ DrawResult LayerTreeHostImpl::CalculateRenderPasses(
   // trigger this DCHECK.
   DCHECK(!have_copy_request || draw_result == DRAW_SUCCESS);
 
+  // Workaround to prevent creating unnecessarily persistent render passes.
+  // When a copy request is made, it may force a separate render pass for the
+  // web contents, which will persist until a new commit removes it. Force a

[danakj, 2015/12/02 23:07:52]

s/web contents/layer/

+  // commit after copy requests, to remove extra render passes.
+  // http://crbug.com/564832

[danakj, 2015/12/02 23:07:52]

prefix this whole comment with TODO(crbug.com/564832): ?

+  if (have_copy_request)
+    client_->SetNeedsCommitOnImplThread();
+
   return draw_result;
 }