Lift out SystemFonts from the PlatformFontWin class

This CL is moving out the internal class SystemFonts on windows to a
separate file. It is mostly moving code around and renaming.

The goal is to remove PlatformFontWin and use the skia
version instead (e.g. PlatformFontSkia). The code specific to
PlatformFontWin needs to be lift out and implemented correctly.
A set of CLs will follow to complete the migration.

Bug: 944227
Change-Id: Ifa508aa6e0de47552249ca08954d2079ae5040e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1534178
Commit-Queue: Etienne Bergeron <[email protected]>
Reviewed-by: Ken Buchanan <[email protected]>
Reviewed-by: Trent Apted <[email protected]>
Reviewed-by: Dana Fried <[email protected]>
Reviewed-by: François Doray <[email protected]>
Reviewed-by: Scott Violet <[email protected]>
Reviewed-by: Etienne Bergeron <[email protected]>
Reviewed-by: Alexei Svitkine <[email protected]>
Cr-Commit-Position: refs/heads/master@{#644943}
13 files changed