cc: Activate when going invisible.

cc/scheduler/scheduler_state_machine.cc

Index: cc/scheduler/scheduler_state_machine.cc
diff --git a/cc/scheduler/scheduler_state_machine.cc b/cc/scheduler/scheduler_state_machine.cc
index 8f38a33d7e31f7299dac0afa87a939b61ce86b8b..ec27528d55cc2e2edc1582e9e3296a183411617d 100644
--- a/cc/scheduler/scheduler_state_machine.cc
+++ b/cc/scheduler/scheduler_state_machine.cc
@@ -299,6 +299,10 @@ bool SchedulerStateMachine::PendingActivationsShouldBeForced() const {
   if (output_surface_state_ == OUTPUT_SURFACE_LOST)
     return true;
 
+  // If we're not visible, we should force activation.

[brianderson, 2014/09/25 18:47:29]

Can you explain the whole checkerboarding issue?

Also, the comments in PendingActivationsShouldBeForced and
PendingDrawsShouldBeAborted indicate that they are only used to avoid deadlock,
which will no longer be true.

[vmpstr, 2014/09/25 19:42:12]

Done.

+  if (!visible_)
+    return true;
+
   return false;
 }