cc: Abort frame when becoming invisible and waiting for ready to draw.

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 ed71923b8f40d7813ddd828a59f6b593f8067b85..9b15475b7368b343ff96eed49bf22e3d96a374fb 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1988,11 +1988,9 @@ void LayerTreeHostImpl::SetVisible(bool visible) {
   else
     EvictAllUIResources();
 
-  // Call PrepareTiles unconditionally on visibility change since this tab may
-  // never get another draw or timer tick. When becoming visible we care about
-  // unblocking the scheduler which might be waiting for activation / ready to
-  // draw. When becoming invisible we care about evicting tiles immediately.
-  PrepareTiles();
+  // Call PrepareTiles to evict tiles when we become invisible.
+  if (!visible)
+    PrepareTiles();
 
   if (!renderer_)
     return;