Don't allocate Strings in FontDescription().

Source/platform/fonts/FontDescription.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  *
  * 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
@@ skipping 37 matching lines @@
 class PLATFORM_EXPORT FontDescription {
 public:
     enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily,
                              MonospaceFamily, CursiveFamily, FantasyFamily, PictographFamily };
 
     enum Kerning { AutoKerning, NormalKerning, NoneKerning };
 
     enum LigaturesState { NormalLigaturesState, DisabledLigaturesState, EnabledLigaturesState };
 
     FontDescription()
-        : m_locale("en")
-        , m_specifiedSize(0)
+        : m_specifiedSize(0)
         , m_computedSize(0)
         , m_letterSpacing(0)
         , m_wordSpacing(0)
         , m_orientation(Horizontal)
         , m_nonCJKGlyphOrientation(NonCJKGlyphOrientationVerticalRight)
         , m_widthVariant(RegularWidth)
         , m_style(FontStyleNormal)
         , m_variant(FontVariantNormal)
         , m_isAbsoluteSize(false)
         , m_weight(FontWeightNormal)
@@ skipping 84 matching lines @@
     Kerning kerning() const { return static_cast<Kerning>(m_kerning); }
     VariantLigatures variantLigatures() const;
     LigaturesState commonLigaturesState() const { return static_cast<LigaturesState>(m_commonLigaturesState); }
     LigaturesState discretionaryLigaturesState() const { return static_cast<LigaturesState>(m_discretionaryLigaturesState); }
     LigaturesState historicalLigaturesState() const { return static_cast<LigaturesState>(m_historicalLigaturesState); }
     LigaturesState contextualLigaturesState() const { return static_cast<LigaturesState>(m_contextualLigaturesState); }
     unsigned keywordSize() const { return m_keywordSize; }
     FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
     TextRenderingMode textRendering() const { return static_cast<TextRenderingMode>(m_textRendering); }
     UScriptCode script() const { return static_cast<UScriptCode>(m_script); }
-    const String& locale() const { return m_locale; }
+    const AtomicString& locale() const;
     bool isSyntheticBold() const { return m_syntheticBold; }
     bool isSyntheticItalic() const { return m_syntheticItalic; }
     bool useSubpixelPositioning() const { return m_subpixelTextPosition; }
 
     FontTraits traits() const;
     float wordSpacing() const { return m_wordSpacing; }
     float letterSpacing() const { return m_letterSpacing; }
     FontOrientation orientation() const { return static_cast<FontOrientation>(m_orientation); }
     NonCJKGlyphOrientation nonCJKGlyphOrientation() const { return static_cast<NonCJKGlyphOrientation>(m_nonCJKGlyphOrientation); }
     FontWidthVariant widthVariant() const { return static_cast<FontWidthVariant>(m_widthVariant); }
@@ skipping 13 matching lines @@
     void setStretch(FontStretch s) { m_stretch = s; }
     void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; }
     void setKerning(Kerning kerning) { m_kerning = kerning; updateTypesettingFeatures(); }
     void setKeywordSize(unsigned s) { m_keywordSize = s; }
     void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; }
     void setTextRendering(TextRenderingMode rendering) { m_textRendering = rendering; updateTypesettingFeatures(); }
     void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
     void setNonCJKGlyphOrientation(NonCJKGlyphOrientation orientation) { m_nonCJKGlyphOrientation = orientation; }
     void setWidthVariant(FontWidthVariant widthVariant) { m_widthVariant = widthVariant; }
     void setScript(UScriptCode s) { m_script = s; }
-    void setLocale(const String& locale) { m_locale = locale; }
+    void setLocale(const AtomicString& locale) { m_locale = locale; }
     void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; }
     void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; }
     void setFeatureSettings(PassRefPtr<FontFeatureSettings> settings) { m_featureSettings = settings; }
     void setTraits(FontTraits);
     void setWordSpacing(float s) { m_wordSpacing = s; }
     void setLetterSpacing(float s) { m_letterSpacing = s; updateTypesettingFeatures(); }
 
     TypesettingFeatures typesettingFeatures() const { return static_cast<TypesettingFeatures>(m_typesettingFeatures); }
 
     static void setSubpixelPositioning(bool b) { s_useSubpixelTextPositioning = b; }
     static bool subpixelPositioning() { return s_useSubpixelTextPositioning; }
 
     static void setDefaultTypesettingFeatures(TypesettingFeatures);
     static TypesettingFeatures defaultTypesettingFeatures();
 
 private:
     FontFamily m_familyList; // The list of font families to be used.
     RefPtr<FontFeatureSettings> m_featureSettings;
-    String m_locale;
+    AtomicString m_locale;
 
     void updateTypesettingFeatures() const;
 
     float m_specifiedSize;   // Specified CSS value. Independent of rendering issues such as integer
                              // rounding, minimum font sizes, and zooming.
     float m_computedSize;    // Computed size adjusted for the minimum font size and the zoom factor.
 
     float m_letterSpacing;
     float m_wordSpacing;
 
@@ skipping 62 matching lines @@
         && m_script == other.m_script
         && m_syntheticBold == other.m_syntheticBold
         && m_syntheticItalic == other.m_syntheticItalic
         && m_featureSettings == other.m_featureSettings
         && m_subpixelTextPosition == other.m_subpixelTextPosition;
 }
 
 } // namespace blink
 
 #endif