gpu: GPU service scheduler.

gpu/command_buffer/client/context_support.h

Index: gpu/command_buffer/client/context_support.h
diff --git a/gpu/command_buffer/client/context_support.h b/gpu/command_buffer/client/context_support.h
index e4b9c4f21f682c34bbf4a00709927c328a494e95..2e066457f59b30ff15b29e938bd4243763a9ac6e 100644
--- a/gpu/command_buffer/client/context_support.h
+++ b/gpu/command_buffer/client/context_support.h
@@ -26,6 +26,8 @@ struct SyncToken;
 
 class ContextSupport {
  public:
+  virtual void EnsureWorkVisibleAsync() = 0;

[piman, 2017/05/09 00:48:38]

nit: please provide documentation. In particular, why having this instead of
just calling Flush? Is it for the thread-safety?

[sunnyps, 2017/05/10 23:15:15]

Sorry, I will split this out into a separate CL. I only included this because I
wanted to run telemetry trybots which doesn't play well with dependent patchsets
AFAIK.

I want to add a thread-safe Flush that flushes the last ordering barrier for the
worker stream. Not 100% sure how to expose it though.

+
   // Runs |callback| when the given sync token is signalled. The sync token may
   // belong to any context.
   virtual void SignalSyncToken(const SyncToken& sync_token,