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On Windows, GetFontData() calls from within sandboxed processes have to
use the font_cache mechanism to work correctly. This requires a
correctly patched GetFontData(), which broke in M76.

https://crbug.com/980577 broke Import Address Table patching for
gdi32.dll. This eventually got fixed, but the final fix in
https://crrev.com/686696 tried to minimize the amount of patching
necessary, and did not get it 100% correct for printing use cases.  As
a result, sometimes utility processes used for printing did not get
patched. This fix by patching utility processes in InitializePDF().
Rearrange the function and update comments along the way.

The font_cache mechanism in the Cloud Print service process also broke
around the same time due to https://crrev.com/660952, but that just got
fixed in https://crrev.com/700317.

Bug: 1005867
Change-Id: I0bb691d8208fbbb9bf885767a959119a388def09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1826197Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#700918}