A remotable font management interface and DirectWrite implementation.

The introduced SkRemotableFontMgr is a font management interface designed for simple and fast proxy support. SkFontMgr_Indirect bridges a SkRemotableFontMgr and a local SkFontMgr to present a SkFontMgr interface.

This change is to be followed by https://codereview.chromium.org/132113015/ and  https://codereview.chromium.org/206693003 .

R=reed@google.com

Review URL: https://codereview.chromium.org/206683002

git-svn-id: http://skia.googlecode.com/svn/trunk@13897 2bbb7eff-a529-9590-31e7-b0007b416f81
14 files changed