Make printf and LOG output to cmd console for Windows

base/process_util.h

 // 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.
 
 // This file/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 
@@ skipping 120 matching lines @@
   TERMINATION_STATUS_PROCESS_WAS_KILLED,   // e.g. SIGKILL or task manager kill
   TERMINATION_STATUS_PROCESS_CRASHED,      // e.g. Segmentation fault
   TERMINATION_STATUS_STILL_RUNNING,        // child hasn't exited yet
   TERMINATION_STATUS_MAX_ENUM
 };
 
 #if defined(USE_LINUX_BREAKPAD)
 BASE_EXPORT extern size_t g_oom_size;
 #endif
 
+#if defined(OS_WIN)
+// Output multi-process printf, cout, cerr, etc to the cmd.exe console that ran
+// chrome. This is not thread-safe: only call from main thread.
+BASE_EXPORT void RouteStdioToConsole();
+#endif
+
 // Returns the id of the current process.
 BASE_EXPORT ProcessId GetCurrentProcId();
 
 // Returns the ProcessHandle of the current process.
 BASE_EXPORT ProcessHandle GetCurrentProcessHandle();
 
 #if defined(OS_WIN)
 // Returns the module handle to which an address belongs. The reference count
 // of the module is not incremented.
 BASE_EXPORT HMODULE GetModuleFromAddress(void* address);
@@ skipping 674 matching lines @@
 // Turns on process termination if memory runs out.
 BASE_EXPORT void EnableTerminationOnOutOfMemory();
 
 #if defined(OS_MACOSX)
 // Exposed for testing.
 BASE_EXPORT malloc_zone_t* GetPurgeableZone();
 #endif  // defined(OS_MACOSX)
 
 // Enables stack dump to console output on exception and signals.
 // When enabled, the process will quit immediately. This is meant to be used in
-// unit_tests only!
+// unit_tests only! This is not thread-safe: only call from main thread.
 BASE_EXPORT bool EnableInProcessStackDumping();
 
 // If supported on the platform, and the user has sufficent rights, increase
 // the current process's scheduling priority to a high priority.
 BASE_EXPORT void RaiseProcessToHighPriority();
 
 #if defined(OS_MACOSX)
 // Restore the default exception handler, setting it to Apple Crash Reporter
 // (ReportCrash).  When forking and execing a new process, the child will
 // inherit the parent's exception ports, which may be set to the Breakpad
 // instance running inside the parent.  The parent's Breakpad instance should
 // not handle the child's exceptions.  Calling RestoreDefaultExceptionHandler
 // in the child after forking will restore the standard exception handler.
 // See http://crbug.com/20371/ for more details.
 void RestoreDefaultExceptionHandler();
 #endif  // defined(OS_MACOSX)
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_UTIL_H_