Remove sandbox on Windows.

components/nacl/renderer/manifest_service_channel.cc

Index: components/nacl/renderer/manifest_service_channel.cc
diff --git a/components/nacl/renderer/manifest_service_channel.cc b/components/nacl/renderer/manifest_service_channel.cc
index b32ee100bb41f0721734aa9d52a53eb52a04b671..7f581a2ae57e309d07d25195fdcc86eb5e04efc9 100644
--- a/components/nacl/renderer/manifest_service_channel.cc
+++ b/components/nacl/renderer/manifest_service_channel.cc
@@ -18,6 +18,15 @@
 #include "ppapi/c/ppb_file_io.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
+namespace content {
+
+bool BrokerDuplicateHandle(HANDLE source_handle,
+                           DWORD target_process_id,
+                           HANDLE* target_handle,
+                           DWORD desired_access,
+                           DWORD options);
+}
+
 namespace nacl {
 
 ManifestServiceChannel::ManifestServiceChannel(