Implement sandbox hooks to forward OPM related GDI system calls.

sandbox/win/src/sandbox_policy_base.h

Index: sandbox/win/src/sandbox_policy_base.h
diff --git a/sandbox/win/src/sandbox_policy_base.h b/sandbox/win/src/sandbox_policy_base.h
index 22004bebf746f3ff05f97e7daf09ed4b6a1f54f8..b5a2a12d1504ccfc5293b9deb2bfbd6428f9de34 100644
--- a/sandbox/win/src/sandbox_policy_base.h
+++ b/sandbox/win/src/sandbox_policy_base.h
@@ -70,6 +70,8 @@ class PolicyBase final : public TargetPolicy {
                                     const base::char16* handle_name) override;
   void AddHandleToShare(HANDLE handle) override;
   void SetLockdownDefaultDacl() override;
+  void SetEnableOPMRedirection() override;
+  bool GetEnableOPMRedirection() override;
 
   // Creates a Job object with the level specified in a previous call to
   // SetJobLevel().
@@ -164,6 +166,7 @@ class PolicyBase final : public TargetPolicy {
   // This list contains handles other than the stderr/stdout handles which are
   // shared with the target at times.
   base::HandlesToInheritVector handles_to_share_;
+  bool enable_opm_redirection_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyBase);
 };