Replace IOSurfaceManager by directly passing IOSurface Mach ports over Chrome IPC.

base/mac/scoped_mach_port.h

Index: base/mac/scoped_mach_port.h
diff --git a/base/mac/scoped_mach_port.h b/base/mac/scoped_mach_port.h
index 67fed6bcfd87769ec639337c890e3654c76426ab..c462663acf722ba6df7792b5873ed9fb8c158a16 100644
--- a/base/mac/scoped_mach_port.h
+++ b/base/mac/scoped_mach_port.h
@@ -8,6 +8,7 @@
 #include <mach/mach.h>
 
 #include "base/base_export.h"
+#include "base/mac/scoped_typeref.h"
 #include "base/scoped_generic.h"
 
 namespace base {
@@ -39,6 +40,11 @@ struct PortSetTraits {
   BASE_EXPORT static void Free(mach_port_t port);
 };
 
+struct RefCountedSendRighTraits {
+  BASE_EXPORT static void Retain(mach_port_t);
+  BASE_EXPORT static void Release(mach_port_t);
+};
+
 }  // namespace internal
 
 // A scoper for handling a Mach port that names a send right. Send rights are
@@ -61,6 +67,13 @@ using ScopedMachReceiveRight =
 // the receive rights that are members of the port set.
 using ScopedMachPortSet = ScopedGeneric<mach_port_t, internal::PortSetTraits>;
 
+// A scoper for handling Mach port names that are send rights. Unlike
+// ScopedMachSendRight, this scoper is both copyable and assignable, which will
+// increase the kernel reference count of the right. Otherwise, this behaves
+// the same as ScopedMachSendRight.
+using ScopedRefCountedMachSendRight =
+    ScopedTypeRef<mach_port_t, internal::RefCountedSendRighTraits>;
+
 }  // namespace mac
 }  // namespace base