Added directwrite warmup for PPAPI processes.
This patch warms up the directwrite skia font code when running a PPAPI
process under win32k lockdown. This allows users of the Skia (such as the
PPAPI itself) to bypass GDI calls when dealing with fonts.

BUG=523278

Review URL: https://codereview.chromium.org/1325843002

Cr-Commit-Position: refs/heads/master@{#350191}
6 files changed