Using the device scale factor for glyph positioning

The master bug is http://code.google.com/p/chromium/issues/detail?id=138101 .
The corresponding WebKit changes for this CL are here:
https://bugs.webkit.org/show_bug.cgi?id=96137

BUG=

Review URL: https://codereview.appspot.com/6506099

git-svn-id: http://skia.googlecode.com/svn/trunk@5508 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed