Detect missing glyphs as returned by Vista in RenderTextWin.
Vista's version of Uniscribe (or possibly of the Meiryo font)
doesn't return glyphs with value wgDefault for characters
that cannot be displayed by that font. Instead, they have
value wgBlank with the fZeroWidth attribute bit set.
This change detects that and determines if there were
missing glyphs based on whether the character(s) that
correspond to the glyph are whitespace characters.
BUG=125629, 105550
TEST=See http://crbug.com/125629
Review URL: http://codereview.chromium.org/10315007
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@135206 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed
