cc: Remove InUseByMacOSWindowServer

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index 6ce48a2a876068913ab4ca5cebf67302e72fb965..25a52a52ad3543f0aa649f83c3e494fdb8617c64 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -454,13 +454,6 @@ class CC_EXPORT ResourceProvider
   // Indicates if we can currently lock this resource for write.
   bool CanLockForWrite(ResourceId id);
 
-  // Indicates if this resource is currently being used as an overlay by the
-  // windowing system.
-  // TODO(ccameron): This should be entirely hidden inside CanLockForWrite, but
-  // will erratically returns true, potentially breaking DCHECKs.
-  // http://crbug.com/577121
-  bool IsInUseByMacOSWindowServer(ResourceId id);
-
   // Indicates if this resource may be used for a hardware overlay plane.
   bool IsOverlayCandidate(ResourceId id);