Configure d8 & cctest to suppress Windows error dialogs.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index f22be5bb5d184125dc0c7c6410d698029113d26b..c5a5ac976386728945d7dfecd29d43f94b92e2d6 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -54,7 +54,12 @@
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
-#endif
+#else
+#include <windows.h>  // NOLINT
+#if defined(_MSC_VER)
+#include <crtdbg.h>  // NOLINT
+#endif               // defined(_MSC_VER)
+#endif               // !defined(_WIN32) && !defined(_WIN64)
 
 #ifndef DCHECK
 #define DCHECK(condition) assert(condition)
@@ -1595,6 +1600,21 @@ class StartupDataHandler {
 
 
 int Shell::Main(int argc, char* argv[]) {
+#if (defined(_WIN32) || defined(_WIN64))
+  UINT new_flags =
+      SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX;
+  UINT existing_flags = SetErrorMode(new_flags);
+  SetErrorMode(existing_flags | new_flags);
+#if defined(_MSC_VER)
+  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
+  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
+  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
+  _set_error_mode(_OUT_TO_STDERR);
+#endif  // defined(_MSC_VER)
+#endif  // defined(_WIN32) || defined(_WIN64)
   if (!SetOptions(argc, argv)) return 1;
   v8::V8::InitializeICU(options.icu_data_file);
   v8::Platform* platform = v8::platform::CreateDefaultPlatform();