Mailbox support for texture layers.

cc/transferable_resource.h

Index: cc/transferable_resource.h
diff --git a/cc/transferable_resource.h b/cc/transferable_resource.h
index 1ab5611c2491e3d4bb9e65e572d6551d84782409..78da5d0a67de30c895731705048c53489bb74ddb 100644
--- a/cc/transferable_resource.h
+++ b/cc/transferable_resource.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "cc/cc_export.h"
 #include "ui/gfx/size.h"
 
@@ -15,9 +16,11 @@ namespace cc {
 
 struct CC_EXPORT Mailbox {
   Mailbox();
+  ~Mailbox();
   bool isZero() const;
   void setName(const int8* name);
   int8 name[64];
+  base::Callback<void(unsigned)> releaseCallback;

[danakj, 2013/01/07 21:10:59]

oh I see.

How about Mailbox::ReleaseCallback, and have texture layer etc use that?

[piman, 2013/01/08 01:45:34]

NAK here, this is intended to be a serialized type and we shouldn't serialize a
callback.
The callback should directly be on the ResourceProvider::Resource, there's no
particular reason it needs to be on the Mailbox.

 };
 
 struct CC_EXPORT TransferableResource {