Remove system call in DW for default font.

Remove system call in DW for default font.

The last user of the GDI default font in DW is
onMatchFamilyStyleCharacter and it doesn't appear to actually need
to use it. This change removes a system call, making things a bit
faster, as well as eliminating a call blocked in the sandbox.

BUG=chromium:459056
Committed: https://skia.googlesource.com/skia/+/c64239a466b6e083ada93c2842d9e48bae606dfe

[bungeman-skia, 2015-04-29 15:05:39]

bungeman@google.com changed reviewers:
+ mtklein@google.com, reed@google.com

[bungeman-skia, 2015-04-29 15:05:40]

See associated bug, but it turns out that win32k lockdown means that the call to
get the default font always fails. Since it turns out we don't actually need to
know it anyway, don't do that.

https://codereview.chromium.org/1107283003/diff/1/gm/fontmgr.cpp
File gm/fontmgr.cpp (left):

https://codereview.chromium.org/1107283003/diff/1/gm/fontmgr.cpp#oldcode109
gm/fontmgr.cpp:109: x = drawCharacter(canvas, 0x5203, x, y, paint, fm,
fName.c_str(), &zh, 1, fs);
Note that fname is the family name, but fName is the name of this gm.

[reed1, 2015-04-29 15:11:51]

lgtm

[bungeman-skia, 2015-04-29 15:12:25]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-04-29 15:12:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1107283003/1

[commit-bot: I haz the power, 2015-04-29 15:15:34]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/c64239a466b6e083ada93c2842d9e48bae606dfe