Make SandboxInterfaceInfo somewhat backwards compatible...

chrome/common/sandbox_init_wrapper_win.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/sandbox_init_wrapper.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 
 #include "chrome/common/chrome_switches.h"
 
 void SandboxInitWrapper::SetServices(sandbox::SandboxInterfaceInfo* info) {
-  if (info) {
+  if (!info)
+    return;
+  if (info->legacy) {
+    // Looks like we are in the case when the new chrome.dll is being launched
+    // by the old chrome.exe, the old chrome exe has SandboxInterfaceInfo as a
+    // union, while now we have a struct.
+    // TODO(cpu): Reomove this nasty hack after M10 release.

[rvargas (doing something else), 2011/02/25 22:26:17]

typo

+    broker_services_ = reinterpret_cast<sandbox::BrokerServices*>(info->legacy);
+    target_services_ = reinterpret_cast<sandbox::TargetServices*>(info->legacy);
+  } else {
+    // Normal case, both the exe and the dll are the same version. Both
+    // interface pointers cannot be non-zero. A process can either be a target
+    // or a broker but not both.
     broker_services_ = info->broker_services;
     target_services_ = info->target_services;
+    DCHECK(!(target_services_ && broker_services_));
   }
-  // Both interface pointers cannot be non-zero. A process can either
-  // be a target or a broker but not both.
-  DCHECK(!(target_services_ && broker_services_));
 }
 
 bool SandboxInitWrapper::InitializeSandbox(const CommandLine& command_line,
                                            const std::string& process_type) {
   if (command_line.HasSwitch(switches::kNoSandbox))
     return true;
   if ((process_type == switches::kRendererProcess) ||
       (process_type == switches::kExtensionProcess) ||
       (process_type == switches::kWorkerProcess) ||
       (process_type == switches::kNaClLoaderProcess) ||
       (process_type == switches::kUtilityProcess)) {
     // The above five process types must be sandboxed unless --no-sandbox
     // is present in the command line.
     if (!target_services_)
       return false;
   } else {
     // Other process types might or might not be sandboxed.
     // TODO(cpu): clean this mess.
     if (!target_services_)
       return true;
   }
   return (sandbox::SBOX_ALL_OK == target_services_->Init());
 }