Merge 181492 "[DirectWrite] Disable subpixel font positioning fo..."

Merge 181492 "[DirectWrite] Disable subpixel font positioning fo..."

> [DirectWrite] Disable subpixel font positioning for certain fonts/sizes
> 
> Conditionally disable subpixel text for certain older fonts at sizes
> below 16px in order to improve legibility and rendering quality. This is
> limited to a specific set of fonts and does not apply to webfonts.
> This list of fonts in question includes all fonts in the "Microsoft Core
> fonts for the Web" collection.
> 
> Specifically the following fonts: arial, courier new, times new roman,
> andale mono, comic sans, impact, georgia, trebuchet, verdana, webdings,
> tahoma, and lucida console.
> 
> R=cpu@chromium.org, scottmg@chromium.org
> BUG=405445, 395425
> 
> Review URL: https://codereview.chromium.org/544843004

TBR=eae@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181683

[eae, 2014-09-09 22:35:43]

Committed patchset #1 (id:1) manually as r181683.