INPUT pattern attribute: Enable "unicode" flag.

third_party/WebKit/Source/bindings/core/v8/ScriptRegexp.cpp

 /*
  * Copyright (C) 2004, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Collabora Ltd.
  * Copyright (C) 2011 Peter Varga (pvarga@webkit.org), University of Szeged
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 36 matching lines @@
     if (caseSensitivity == TextCaseInsensitive)
         flags |= v8::RegExp::kIgnoreCase;
     if (multilineMode == MultilineEnabled)
         flags |= v8::RegExp::kMultiline;
     if (charMode == UTF16)
         flags |= v8::RegExp::kUnicode;
 
     v8::Local<v8::RegExp> regex;
     if (v8::RegExp::New(context, v8String(isolate, pattern), static_cast<v8::RegExp::Flags>(flags)).ToLocal(&regex))
         m_regex.set(isolate, regex);
+    if (tryCatch.HasCaught() && !tryCatch.Message().IsEmpty())
+        m_exceptionMessage = toCoreStringWithUndefinedOrNullCheck(tryCatch.Message()->Get());
 }
 
 int ScriptRegexp::match(const String& string, int startFrom, int* matchLength) const
 {
     if (matchLength)
         *matchLength = 0;
 
     if (m_regex.isEmpty() || string.isNull())
         return -1;
 
@@ skipping 37 matching lines @@
         v8::Local<v8::Value> match;
         if (!result->Get(context, 0).ToLocal(&match))
             return -1;
         *matchLength = match.As<v8::String>()->Length();
     }
 
     return matchOffset.As<v8::Int32>()->Value() + startFrom;
 }
 
 } // namespace blink