Share SyncPointManager implementation in in-process cmd buffer

gpu/command_buffer/service/sync_point_manager.h

Index: gpu/command_buffer/service/sync_point_manager.h
diff --git a/gpu/command_buffer/service/sync_point_manager.h b/gpu/command_buffer/service/sync_point_manager.h
index 8cbf8a838f97c8a2ad57332c25103dfc680a6687..0a007ba8409375ca38982930e3287deb1c0294f9 100644
--- a/gpu/command_buffer/service/sync_point_manager.h
+++ b/gpu/command_buffer/service/sync_point_manager.h
@@ -10,10 +10,14 @@
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
-#include "base/threading/thread_checker.h"
 #include "gpu/gpu_export.h"
 
+namespace base {
+class SequenceChecker;
+}
+
 namespace gpu {
 
 // This class manages the sync points, which allow cross-channel
@@ -45,8 +49,9 @@ class GPU_EXPORT SyncPointManager
   typedef base::hash_map<uint32, ClosureList> SyncPointMap;
 
   ~SyncPointManager();
+  void CheckSequencedThread();
 
-  base::ThreadChecker thread_checker_;
+  scoped_ptr<base::SequenceChecker> sequence_checker_;
 
   // Protects the 2 fields below. Note: callbacks shouldn't be called with this
   // held.