Reduce overhead of SkFontHost_FreeType::onFilterRec.

Reduce overhead of SkFontHost_FreeType::onFilterRec.

The current code is using AutoFTAccess just to access the FT_Library.
However, it does not need to resolve the FT_Face, just the FT_Library.
This unecessary overhead and is removed by this change.
The longer term solution is for SkFontMgr to initialize FreeType.

Committed: https://skia.googlesource.com/skia/+/d4742fa550bafce5225cd267437eadef177c5945

[bungeman-skia, 2015-01-21 16:37:58]

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

[bungeman-skia, 2015-01-21 16:37:59]

There's a longer term plan, but we can make things faster in the meantime.

[bungeman-skia, 2015-01-21 17:43:28]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-01-21 17:44:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/835583003/1

[commit-bot: I haz the power, 2015-01-21 17:44:10]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2015-01-21 23:44 UTC

[jvanverth1, 2015-01-21 19:17:25]

lgtm

[commit-bot: I haz the power, 2015-01-21 19:19:26]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/d4742fa550bafce5225cd267437eadef177c5945

[reed1, 2015-01-21 19:29:34]

https://codereview.chromium.org/835583003/diff/1/src/ports/SkFontHost_FreeTyp...
File src/ports/SkFontHost_FreeType.cpp (right):

https://codereview.chromium.org/835583003/diff/1/src/ports/SkFontHost_FreeTyp...
src/ports/SkFontHost_FreeType.cpp:704: if (!gFTLibrary->isLCDSupported() &&
isLCD(*rec)) {
maybe move the isLCD() check outside of the mutex-grab?