Revert 125989 - Temporarily disable image transport surface on windows.

content/common/sandbox_policy.cc

 // Copyright (c) 2012 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 "content/common/sandbox_policy.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 304 matching lines @@
                             sandbox::USER_LIMITED);
       policy->SetJobLevel(sandbox::JOB_UNPROTECTED, 0);
       policy->SetDelayedIntegrityLevel(sandbox::INTEGRITY_LEVEL_LOW);
     } else {
       if (cmd_line->GetSwitchValueASCII(switches::kUseGL) ==
           gfx::kGLImplementationSwiftShaderName ||
           cmd_line->HasSwitch(switches::kReduceGpuSandbox)) {
         policy->SetTokenLevel(sandbox::USER_RESTRICTED_SAME_ACCESS,
                               sandbox::USER_LIMITED);
       } else {
-        // Temporarily reduce sandbox level while we disable the use of image
-        // transport surface in all versions of windows.
         policy->SetTokenLevel(sandbox::USER_RESTRICTED_SAME_ACCESS,
-                              sandbox::USER_LIMITED);
+                              sandbox::USER_RESTRICTED);
       }
 
       // UI restrictions break when we access Windows from outside our job.
       // However, we don't want a proxy window in this process because it can
       // introduce deadlocks where the renderer blocks on the gpu, which in
       // turn blocks on the browser UI thread. So, instead we forgo a window
       // message pump entirely and just add job restrictions to prevent child
       // processes.
       policy->SetJobLevel(sandbox::JOB_LIMITED_USER,
                           JOB_OBJECT_UILIMIT_SYSTEMPARAMETERS |
@@ skipping 249 matching lines @@
 
   // Help the process a little. It can't start the debugger by itself if
   // the process is in a sandbox.
   if (child_needs_help)
     base::debug::SpawnDebuggerOnProcess(target.dwProcessId);
 
   return process;
 }
 
 }  // namespace sandbox