Sandbox policy and intercepts for the MITIGATION_WIN32K_DISABLE policy for renderer processes.

sandbox/win/src/sandbox_policy.h

Index: sandbox/win/src/sandbox_policy.h
diff --git a/sandbox/win/src/sandbox_policy.h b/sandbox/win/src/sandbox_policy.h
index a9f124516218ae00cebb1f42cf58bd7250798234..e4773c869d5b9368e4dce5a6a5ac544cb436cbb8 100644
--- a/sandbox/win/src/sandbox_policy.h
+++ b/sandbox/win/src/sandbox_policy.h
@@ -26,7 +26,8 @@ class TargetPolicy {
     SUBSYS_PROCESS,           // Creation of child processes.
     SUBSYS_REGISTRY,          // Creation and opening of registry keys.
     SUBSYS_SYNC,              // Creation of named sync objects.
-    SUBSYS_HANDLES            // Duplication of handles to other processes.
+    SUBSYS_HANDLES,           // Duplication of handles to other processes.
+    SUBSYS_WIN32K_LOCKDOWN    // Win32K Lockdown related policy.
   };
 
   // Allowable semantics when a rule is matched.
@@ -52,7 +53,12 @@ class TargetPolicy {
     EVENTS_ALLOW_ANY,      // Allows the creation of an event with full access.
     EVENTS_ALLOW_READONLY, // Allows opening an even with synchronize access.
     REG_ALLOW_READONLY,    // Allows readonly access to a registry key.
-    REG_ALLOW_ANY          // Allows read and write access to a registry key.
+    REG_ALLOW_ANY,         // Allows read and write access to a registry key.
+    FAKE_USER32_GDI32_INIT // Fakes user32 and gdi32 initialization. This is

[rvargas (doing something else), 2014/06/10 03:11:18]

nit: can we get rid of the 32s? as in FAKE_USER_GDI_INIT

[ananta, 2014/06/10 21:48:06]

Done.

+                           // used to get the sandboxed process to launch if

[rvargas (doing something else), 2014/06/10 03:11:18]

How about:
"Fakes user32 and gdi32 initialization. This can be used to allow the DLLs to
load even if the process cannot access that subsystem." 

[ananta, 2014/06/10 21:48:06]

Done.

+                           // the Win32K lockdown mitigation is set. This
+                           // ensures that these dlls initialize without errors
+                           // which ensures that the target launches.
   };
 
   // Increments the reference count of this object. The reference count must