Add a SkTypeface::CreateForChars() function.

This allows us to do font fallback for strange scripts.
Added empty stubs to the implementations on all platforms.

Patch-by: Evan Martin
Signed-off-by: Adam Langley

http://codereview.appspot.com/950041

git-svn-id: http://skia.googlecode.com/svn/trunk@557 2bbb7eff-a529-9590-31e7-b0007b416f81
11 files changed