Add AtomicString, SkString version of equalIgnoringCase

Source/core/platform/graphics/skia/FontCacheSkiaWin.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Computer, Inc.
  * Copyright (c) 2006, 2007, 2008, 2009, 2012 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.
@@ skipping 139 matching lines @@
     // we get out of the loop, |i| will be |i + 1|. That is, if only the
     // last font in the array covers the character, |i| will be numFonts.
     // So, we have to use '<=" rather than '<' to see if we found a font
     // covering the character.
     if (i <= numFonts)
         return getFontResourceData(data, DoNotRetain);
 
     return 0;
 }
 
+static inline bool equalIgnoringCase(const AtomicString& a, const SkString& b)
+{
+    return equalIgnoringCase(a, AtomicString::fromUTF8(b.c_str()));
+}
+
 static bool typefacesMatchesFamily(const SkTypeface* tf, const AtomicString& family)
 {
     SkTypeface::LocalizedStrings* actualFamilies = tf->createFamilyNameIterator();
     bool matchesRequestedFamily = false;
     SkTypeface::LocalizedString actualFamily;
 
     while (actualFamilies->next(&actualFamily)) {
-        if (equalIgnoringCase(family, AtomicString::fromUTF8(actualFamily.fString.c_str()))) {
+        if (equalIgnoringCase(family, actualFamily.fString)) {
             matchesRequestedFamily = true;
             break;
         }
     }
     actualFamilies->unref();
 
     return matchesRequestedFamily;
 }
 
 FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
@@ skipping 17 matching lines @@
         name.data(),
         fontDescription.computedSize(),
         fontDescription.weight() >= FontWeightBold && !tf->isBold(),
         fontDescription.italic() && !tf->isItalic(),
         fontDescription.orientation());
     tf->unref();
     return result;
 }
 
 }