Merge 76108 - Make SandboxInterfaceInfo somewhat backwards compatible...

sandbox/src/sandbox_types.h

Index: sandbox/src/sandbox_types.h
===================================================================
--- sandbox/src/sandbox_types.h	(revision 76120)
+++ sandbox/src/sandbox_types.h	(working copy)
@@ -53,10 +53,15 @@
 class TargetServices;
 class BrokerServices;
 
-// Contains the pointer to a target or broker service.
+// Contains the pointer to a target or broker service. Older code used
+// a union so the |legacy| member is there for us to detect we are
+// being passed a SandboxInterfaceInfo by old code. If legacy is not
+// null it means we are dealing with old code a must copy this value
+// into both |broker_services| and |target_services|.
 struct SandboxInterfaceInfo {
+  void* legacy;
+  BrokerServices* broker_services;
   TargetServices* target_services;
-  BrokerServices* broker_services;
 };
 
 #if SANDBOX_EXPORTS