C++11: Replace 0 with nullptr where applicable in layout code.

Source/core/layout/LayoutText.h

Index: Source/core/layout/LayoutText.h
diff --git a/Source/core/layout/LayoutText.h b/Source/core/layout/LayoutText.h
index 8f2c2b256d3c628e823b567aaaffdab8c0356885..9e01976412305f7a96e47212a9b41c9d2f8902fa 100644
--- a/Source/core/layout/LayoutText.h
+++ b/Source/core/layout/LayoutText.h
@@ -66,13 +66,13 @@ public:
     void dirtyLineBoxes();
 
     virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const override final;
-    void absoluteRectsForRange(Vector<IntRect>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = 0);
+    void absoluteRectsForRange(Vector<IntRect>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = nullptr);
 
     virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const override final;
-    void absoluteQuadsForRange(Vector<FloatQuad>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = 0);
+    void absoluteQuadsForRange(Vector<FloatQuad>&, unsigned startOffset = 0, unsigned endOffset = INT_MAX, bool useSelectionHeight = false, bool* wasFixed = nullptr);
 
     enum ClippingOption { NoClipping, ClipToEllipsis };
-    void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed = 0, ClippingOption = NoClipping) const;
+    void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed = nullptr, ClippingOption = NoClipping) const;
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override;
 
@@ -86,8 +86,8 @@ public:
     unsigned textLength() const { return m_text.length(); } // non virtual implementation of length()
     void positionLineBox(InlineBox*);
 
-    virtual float width(unsigned from, unsigned len, const Font&, LayoutUnit xPos, TextDirection, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
-    virtual float width(unsigned from, unsigned len, LayoutUnit xPos, TextDirection, bool firstLine = false, HashSet<const SimpleFontData*>* fallbackFonts = 0, GlyphOverflow* = 0) const;
+    virtual float width(unsigned from, unsigned len, const Font&, LayoutUnit xPos, TextDirection, HashSet<const SimpleFontData*>* fallbackFonts = nullptr, GlyphOverflow* = nullptr) const;
+    virtual float width(unsigned from, unsigned len, LayoutUnit xPos, TextDirection, bool firstLine = false, HashSet<const SimpleFontData*>* fallbackFonts = nullptr, GlyphOverflow* = nullptr) const;
 
     float minLogicalWidth() const;
     float maxLogicalWidth() const;
@@ -115,7 +115,7 @@ public:
     virtual bool canBeSelectionLeaf() const override { return true; }
     virtual void setSelectionState(SelectionState) override final;
     virtual LayoutRect selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const override;
-    virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0) override;
+    virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = nullptr) override;
 
     InlineTextBox* firstTextBox() const { return m_firstTextBox; }
     InlineTextBox* lastTextBox() const { return m_lastTextBox; }
@@ -179,7 +179,7 @@ private:
 
     bool isText() const = delete; // This will catch anyone doing an unnecessary check.
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override;
+    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
 
     void checkConsistency() const;