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Source/platform/fonts/shaping/SimpleShaper.h

Index: Source/platform/fonts/shaping/SimpleShaper.h
diff --git a/Source/platform/fonts/shaping/SimpleShaper.h b/Source/platform/fonts/shaping/SimpleShaper.h
index 83235bd9f5fba533dd1729106ec10d062b214f44..415a231c45db270c5155555ebf53e3664c9d1bb1 100644
--- a/Source/platform/fonts/shaping/SimpleShaper.h
+++ b/Source/platform/fonts/shaping/SimpleShaper.h
@@ -45,7 +45,7 @@ public:
     SimpleShaper(const Font*, const TextRun&, const GlyphData* emphasisData = nullptr,
         HashSet<const SimpleFontData*>* fallbackFonts = nullptr, FloatRect* = nullptr);
 
-    unsigned advance(unsigned to, GlyphBuffer* = 0);
+    unsigned advance(int to, GlyphBuffer* = 0);

[pdr., 2015/10/06 23:07:07]

Can you also add a comment that we need to fix this? I went ahead and filed
crbug.com/540047.
// TODO(sk.kumar): This function should be updated to take an unsigned value,
and callers
// should be updated to not pass negative values. See: crbug.com/540047.

(the sk.kumar part doesn't mean you have to fix the bug, it's just a convention
for filing todos)

     bool advanceOneCharacter(float& width);
 
     const TextRun& run() const { return m_textRun; }