Implement platform-independent DrawGlyphs for Flash.

Implement platform-independent DrawGlyphs for Flash.

[ Re-land of 114076 http://codereview.chromium.org/8899015 ]

This code was platform independent so could just be copied over into the
platform independent file with no changes.
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=114220

[reed1, 2011-12-13 16:38:48]

I think we're leaking the typeface.

tf = Create();
// now the refcnt is 1
paint.setTypeface(tf);
// now the refcnt is 2
~paint
// now the refcnt is 1, leaked

Another pattern could be

SkTypeface* tf = Create();
SkAutoUnref aur(tf);

SkAutoCanvasRestore acr(canvas, true);

Now you can return at any point after acr, and nothing will leak or be
unbalanced. Passing true to acr executes the save() for you, and will
automatically call restore().