Use an experiment value to set the instant_extended.enabled pref default.

base/process_util_win.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 "base/process_util.h"
 
 #include <fcntl.h>
 #include <io.h>
 #include <windows.h>
 #include <userenv.h>
@@ skipping 228 matching lines @@
   HANDLE process_with_query_rights;
   if (DuplicateHandle(current_process, process, current_process,
                       &process_with_query_rights, PROCESS_QUERY_INFORMATION,
                       false, 0)) {
     DWORD id = GetProcessId(process_with_query_rights);
     CloseHandle(process_with_query_rights);
     return id;
   }
 
   // We're screwed.
-  NOTREACHED();
+  //NOTREACHED();

[MAD, 2013/01/31 20:14:53]

Really?

[robertshield, 2013/01/31 20:24:28]

Heh, oops, local patch until Brett reads
https://codereview.chromium.org/12087104.

Removed

   return 0;
 }
 
 bool GetProcessIntegrityLevel(ProcessHandle process, IntegrityLevel *level) {
   if (!level)
     return false;
 
   if (win::GetVersion() < base::win::VERSION_VISTA)
     return false;
 
@@ skipping 746 matching lines @@
 
   PERFORMANCE_INFORMATION info;
   if (!InternalGetPerformanceInfo(&info, sizeof(info))) {
     DLOG(ERROR) << "Failed to fetch internal performance info.";
     return 0;
   }
   return (info.CommitTotal * system_info.dwPageSize) / 1024;
 }
 
 }  // namespace base