Store a copy of generic font settings at CSSFontSelector.

Source/platform/fonts/GenericFontFamilySettings.cpp

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "platform/fonts/GenericFontFamilySettings.h"
 
 namespace WebCore {
 
+GenericFontFamilySettings::GenericFontFamilySettings(const GenericFontFamilySettings& other)
+    : m_standardFontFamilyMap(other.m_standardFontFamilyMap)
+    , m_serifFontFamilyMap(other.m_serifFontFamilyMap)
+    , m_fixedFontFamilyMap(other.m_fixedFontFamilyMap)
+    , m_sansSerifFontFamilyMap(other.m_sansSerifFontFamilyMap)
+    , m_cursiveFontFamilyMap(other.m_cursiveFontFamilyMap)
+    , m_fantasyFontFamilyMap(other.m_fantasyFontFamilyMap)
+    , m_pictographFontFamilyMap(other.m_pictographFontFamilyMap)
+{
+}
+
 // Sets the entry in the font map for the given script. If family is the empty string, removes the entry instead.
 void GenericFontFamilySettings::setGenericFontFamilyMap(ScriptFontFamilyMap& fontMap, const AtomicString& family, UScriptCode script)
 {
     ScriptFontFamilyMap::iterator it = fontMap.find(static_cast<int>(script));
     if (family.isEmpty()) {
         if (it == fontMap.end())
             return;
         fontMap.remove(it);
     } else if (it != fontMap.end() && it->value == family) {
         return;
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     m_standardFontFamilyMap.clear();
     m_serifFontFamilyMap.clear();
     m_fixedFontFamilyMap.clear();
     m_sansSerifFontFamilyMap.clear();
     m_cursiveFontFamilyMap.clear();
     m_fantasyFontFamilyMap.clear();
     m_pictographFontFamilyMap.clear();
 }
 
 }