Use less conservative condition when detecting noncharacter unicode symbols

Source/core/inspector/InspectorFrontendHost.cpp

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  *
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 147 matching lines @@
 void InspectorFrontendHost::copyText(const String& text)
 {
     Pasteboard::generalPasteboard()->writePlainText(text, Pasteboard::CannotSmartReplace);
 }
 
 static String escapeUnicodeNonCharacters(const String& str)
 {
     StringBuilder dst;
     for (unsigned i = 0; i < str.length(); ++i) {
         UChar c = str[i];
-        if (c > 126) {
+        if (c >= 0xD800) {
             unsigned symbol = static_cast<unsigned>(c);
             String symbolCode = String::format("\\u%04X", symbol);
             dst.append(symbolCode);
         } else {
             dst.append(c);
         }
 
     }
     return dst.toString();
 }
@@ skipping 36 matching lines @@
 {
     return RenderTheme::theme().activeSelectionForegroundColor().serialized();
 }
 
 bool InspectorFrontendHost::isUnderTest()
 {
     return m_client && m_client->isUnderTest();
 }
 
 } // namespace WebCore