Linux: use other fonts when the primary is missing glyphs

webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp

Index: webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp
diff --git a/webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp b/webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp
index fd5aa4e706d08077d17b52f1fb19cd5869b986cc..65b02c72758ef61f786d16cac3fd125be4b60711 100644
--- a/webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp
+++ b/webkit/port/platform/graphics/chromium/GlyphPageTreeNodeLinux.cpp
@@ -63,7 +63,7 @@ bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned b
 
     unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero
     for (unsigned i = 0; i < length; i++) {
-        setGlyphDataForIndex(offset + i, glyphs[i], fontData);
+        setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? fontData : NULL);
         allGlyphs |= glyphs[i];
     }
     return allGlyphs != 0;