Avoid re-parsing of string in fillText and measureText in Canvas

Source/platform/fonts/mac/FontComplexTextMac.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 140 matching lines @@
     ComplexTextController controller(this, run);
     return controller.offsetForPosition(x, includePartialGlyphs);
 }
 
 const SimpleFontData* Font::fontDataForCombiningCharacterSequence(const UChar* characters, size_t length, FontDataVariant variant) const
 {
     UChar32 baseCharacter;
     size_t baseCharacterLength = 0;
     U16_NEXT(characters, baseCharacterLength, length, baseCharacter);
 
-    GlyphData baseCharacterGlyphData = glyphDataForCharacter(baseCharacter, false, variant);
+    GlyphData baseCharacterGlyphData = glyphDataForCharacter(baseCharacter, false, false, variant);
 
     if (!baseCharacterGlyphData.glyph)
         return 0;
 
     if (length == baseCharacterLength)
         return baseCharacterGlyphData.fontData;
 
     bool triedBaseCharacterFontData = false;
 
     unsigned i = 0;
@@ skipping 28 matching lines @@
             return simpleFontData;
     }
 
     if (!triedBaseCharacterFontData && baseCharacterGlyphData.fontData && baseCharacterGlyphData.fontData->canRenderCombiningCharacterSequence(characters, length))
         return baseCharacterGlyphData.fontData;
 
     return SimpleFontData::systemFallback();
 }
 
 } // namespace blink