Print stack traces in child processes when browser tests failed.

mojo/application/public/cpp/lib/application_runner.cc

Index: mojo/application/public/cpp/lib/application_runner.cc
diff --git a/mojo/application/public/cpp/lib/application_runner.cc b/mojo/application/public/cpp/lib/application_runner.cc
index 312789208c9605a9aa2107de131a0a711012ef1d..12125ffc9858215ce3163092c3eb2ebb26e8bb75 100644
--- a/mojo/application/public/cpp/lib/application_runner.cc
+++ b/mojo/application/public/cpp/lib/application_runner.cc
@@ -9,6 +9,7 @@
 #include "base/debug/stack_trace.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/process/launch.h"
 #include "base/threading/worker_pool.h"
 #include "mojo/application/public/cpp/application_delegate.h"
 #include "mojo/application/public/cpp/application_impl.h"
@@ -46,8 +47,11 @@ MojoResult ApplicationRunner::Run(MojoHandle application_request_handle,
   if (init_base) {
     InitBaseCommandLine();
     at_exit.reset(new base::AtExitManager);
-#ifndef NDEBUG
+#ifndef OFFICIAL_BUILD
     base::debug::EnableInProcessStackDumping();
+#if defined(OS_WIN)
+    base::RouteStdioToConsole(false);
+#endif
 #endif
   }