Set linear-text flag on by default

third_party/WebKit/Source/platform/fonts/mac/FontPlatformDataMac.mm

 /*
  * This file is part of the internal font implementation.
  *
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (c) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 119 matching lines @@
 
     paint->setAntiAlias(shouldAntialias);
     paint->setEmbeddedBitmapText(false);
     const float ts = m_textSize >= 0 ? m_textSize : 12;
     paint->setTextSize(SkFloatToScalar(ts));
     paint->setTypeface(typeface());
     paint->setFakeBoldText(m_syntheticBold);
     paint->setTextSkewX(m_syntheticItalic ? -SK_Scalar1 / 4 : 0);
     paint->setLCDRenderText(shouldSmoothFonts);
     paint->setSubpixelText(true);
+    paint->setLinearText(true);
 
     // When rendering using CoreGraphics, disable hinting when webkit-font-smoothing:antialiased or
     // text-rendering:geometricPrecision is used.
     // See crbug.com/152304
     if (font && (font->getFontDescription().fontSmoothing() == Antialiased || font->getFontDescription().textRendering() == GeometricPrecision))
         paint->setHinting(SkPaint::kNo_Hinting);
 }
 
 FontPlatformData::FontPlatformData(NSFont *nsFont, float size, bool syntheticBold, bool syntheticItalic, FontOrientation orientation)
     : m_textSize(size)
     , m_syntheticBold(syntheticBold)
     , m_syntheticItalic(syntheticItalic)
     , m_orientation(orientation)
     , m_isHashTableDeletedValue(false)
 {
     DCHECK(nsFont);
     if (canLoadInProcess(nsFont)) {
         m_typeface = adoptRef(SkCreateTypefaceFromCTFont(toCTFontRef(nsFont)));
     } else {
         // In process loading fails for cases where third party font manager software
         // registers fonts in non system locations such as /Library/Fonts
         // and ~/Library Fonts, see crbug.com/72727 or crbug.com/108645.
         m_typeface = loadFromBrowserProcess(nsFont, size);
     }
 }
 
 } // namespace blink