Allow layers to signal that additional sequences are needed before surface destruction

cc/surfaces/surface_manager.h

Index: cc/surfaces/surface_manager.h
diff --git a/cc/surfaces/surface_manager.h b/cc/surfaces/surface_manager.h
index 66db9d90ee38df8e10e604dd75463ab3d6644f97..4b5512b615a819310c9e3fe8019f301926cca3ea 100644
--- a/cc/surfaces/surface_manager.h
+++ b/cc/surfaces/surface_manager.h
@@ -47,7 +47,8 @@ class CC_SURFACES_EXPORT SurfaceManager {
   void SurfaceModified(SurfaceId surface_id);
 
   // A frame for a surface satisfies a set of sequence numbers.

[jamesr, 2014/10/29 00:51:10]

can you update the comment to clarify that the set of sequence numbers all come
from the specified id namespace? the decomposition of sequences into the two
pairs isn't completely obvious otherwise, imo

-  void DidSatisfySequences(SurfaceId id, std::vector<uint32_t>* sequence);
+  void DidSatisfySequences(uint32_t id_namespace,
+                           std::vector<uint32_t>* sequence);
 
  private:
   void SearchForSatisfaction();