[DevTools] Fix V8 inspector compilation on SmartOS

third_party/WebKit/Source/platform/v8_inspector/PlatformSTL.h

 // Copyright (c) 2016 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.
 
 #ifndef PlatformSTL_h
 #define PlatformSTL_h
 
 #include <memory>
 
 #define PLATFORM_EXPORT
@@ skipping 290 matching lines @@
     va_list argp;
     va_start(argp, format);
     int ret = _vscprintf(format, argp);
     vsnprintf_s(buffer, n, _TRUNCATE, format, argp);
     va_end(argp);
     return ret;
 }
 } // namespace std
 #endif // (_WIN32) && defined( _MSC_VER ) && (_MSC_VER < 1900)
 
+#ifdef __sun
+namespace std {
+using ::snprintf;
+} // namespace std
+#endif // __sun
+
 #endif // PlatformSTL_h