Make printf and LOG output to cmd console for Windows

base/process_util.h

Index: base/process_util.h
diff --git a/base/process_util.h b/base/process_util.h
index 04c1d88d2b80b244016d57adca68438cb7674085..25d24202272c9cb3413a61db2658e75da2ba6d32 100644
--- a/base/process_util.h
+++ b/base/process_util.h
@@ -138,6 +138,12 @@ enum TerminationStatus {
 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();
 
@@ -832,7 +838,7 @@ BASE_EXPORT malloc_zone_t* GetPurgeableZone();
 
 // 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