Prepare the sandbox for integration with NaCl broker for 64-bit Windows. The ...

sandbox/src/sandbox_policy_base.cc

Index: sandbox/src/sandbox_policy_base.cc
===================================================================
--- sandbox/src/sandbox_policy_base.cc	(revision 36231)
+++ sandbox/src/sandbox_policy_base.cc	(working copy)
@@ -389,6 +389,8 @@
   uint32 tag = ipc->ipc_tag;
 
   switch (tag) {
+#ifndef _WIN64  // TODO(gregoryd): To build this code for 64-bits Windows we
+                // need to make sure IPC is fully ported to Win64.
     case IPC_PING1_TAG: {
       uint32 cookie = bit_cast<uint32>(arg1);
       COMPILE_ASSERT(sizeof(cookie) == sizeof(arg1), breaks_with_64_bit);
@@ -398,6 +400,7 @@
       ipc->return_info.extended[1].unsigned_int = 2 * cookie;
       return true;
     }
+#endif
     case IPC_PING2_TAG: {
       CountedBuffer* io_buffer = reinterpret_cast<CountedBuffer*>(arg1);
       if (sizeof(uint32) != io_buffer->Size())