Add DPLOGs to base::LaunchProcess() failures on Windows.

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 333 matching lines @@
 
   if (options.force_breakaway_from_job_)
     flags |= CREATE_BREAKAWAY_FROM_JOB;
 
   base::win::ScopedProcessInformation process_info;
 
   if (options.as_user) {
     flags |= CREATE_UNICODE_ENVIRONMENT;
     void* enviroment_block = NULL;
 
-    if (!CreateEnvironmentBlock(&enviroment_block, options.as_user, FALSE))
+    if (!CreateEnvironmentBlock(&enviroment_block, options.as_user, FALSE)) {
+      DPLOG(ERROR);
       return false;
+    }
 
     BOOL launched =
         CreateProcessAsUser(options.as_user, NULL,
                             const_cast<wchar_t*>(cmdline.c_str()),
                             NULL, NULL, options.inherit_handles, flags,
                             enviroment_block, NULL, &startup_info,
                             process_info.Receive());
     DestroyEnvironmentBlock(enviroment_block);
-    if (!launched)
+    if (!launched) {
+      DPLOG(ERROR);
       return false;
+    }
   } else {
     if (!CreateProcess(NULL,
                        const_cast<wchar_t*>(cmdline.c_str()), NULL, NULL,
                        options.inherit_handles, flags, NULL, NULL,
                        &startup_info, process_info.Receive())) {
+      DPLOG(ERROR);
       return false;
     }
   }
 
   if (options.job_handle) {
     if (0 == AssignProcessToJobObject(options.job_handle,
                                       process_info.process_handle())) {
       DLOG(ERROR) << "Could not AssignProcessToObject.";
       KillProcess(process_info.process_handle(), kProcessKilledExitCode, true);
       return false;
@@ skipping 633 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